Friction is one of the forces working against a moving object, it makes it harder to move the more friction is exerted on the object. So, by reducing friction, you are making it easier for you to be able to move objects.
a marble rolls horizontally off a table that is 0.8m tall. if the marble lands 0.6m from the base of the table, what is the initial velocity of the marble?
The initial velocity of the marble from the given position is 1.49 m/s.
The given parameters;
height of the table, h = 0.8 mhorizontal distance traveled by the train, X = 0.6 mThe time of motion of the marble from the given height is calculated as;
[tex]h = v_yt + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\t = \sqrt{\frac{2h}{g} } \\\\t = \sqrt{\frac{2\times 0.8}{9.8} }\\\\t = 0.404 \ s[/tex]
The initial horizontal velocity of the marble is calculated as follows;
[tex]X = v_0_xt\\\\v_0_x = \frac{X}{t} \\\\v_0_x = \frac{0.6}{0.404} \\\\v_0_x = 1.49 \ m/s[/tex]
Thus, the initial velocity of the marble from the given position is 1.49 m/s.
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A worker pushes a box across the floor to the right at a constant speed with a force of 25N. What can you conclude about the box?
A. An unbalanced force of 25N is acting on the box.
B. The net horizontal force acting on the box is 50N.
C. Friction between the box and the floor is 25N to the left.
D. Friction between the box and the floor is 25N to the right.
Answer:
C. Friction between the box and the floor is 25N to the left
Explanation:
Answer:
Since the forces exerted on the box are equal and opposite in direction, the net force will be 0, so the box will not move.
Explanation:
UwU
Heavier elements like gold are created in the most massive stars and spread through the universe when these stars explode. This explosion is called a
Answer:
Big bang
Explanation:
Trust me I know :)
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Lillith (from brainly)
What needs to be applied in order to change an object's momentum?
a. kinetic energy
b. impulse force
c. a new velocity
d. it’s mass
Answer:
B
Explanation:
if you want to change an object's momentum you need to apply force to the object
2
Which graph represents the motion of a car that is travelling along a straight road with a uniformly
increasing speed?
A
B.
С
D
o acceleration
acceleration
o displacement
o displacement
Tannie
tume
Answer:
I know someone that has the answer
Explanation:
A
PLS HELP 15 PNTS AND BRAINLSIT FOR CORRECT ASNWER PLSSSS HELP MEEE
i’m not sure if it’s A or B
3. In Figure 2, which object (A, B, or C) has the highest density? Why?
Answer: C Because it has more dots in the rectangle meaning that if it has more dots than others then it has a higher density according to the model
Explanation:
Is this speed, velocity or acceleration
Answer:
Speed
Explanation:
There is no other information that involves or asks about the velocity or acceleration. Since that rules out two you will be left with one only option.
Define the words offense and defense in flag football
Answer: I believe offense is the attacking team and defense is the defending team
Source: I just peeked at dad watching football
What happens when equal forces
are exerted in opposite directions
(the same amount of push and
pull)?
A. There is positive net force.
B. There is negative net force.
C. The net force is zero.
D. There is a small net force.
Answer:
B I'm Pretty Sure :DDD
Explanation:
Balanced Forces
In one of your situations in the last section, you pushed or pulled on an object from opposite directions but with the same force. You observed that the object did not move. When the forces on an object are equal and in opposite directions, the forces are balanced, and there is no change in motion.
The gravitational potential energy of an object moving on the ground is
Answer: ΔPEg = mgh
Explanation: Increases in height and the acceleration due to gravity. The gravitational potential energy of an object near Earth's surface is due to its position in the mass-Earth system.
Clyde takes a flight from Bellingham to Seattle, which is a distance of 90-miles,
at a constant speed of 180-mi/hr. He then rents a car and drives to a friend's house in Mt.
Vernon at 60-mi/hr. Mt Vernon is 30-miles from Bellingham.
What is trip distance?
The leaves of plants contain specialized parts that absorb energy from sunlight. Which feature would help a plant better compete for sunlight?
leaves that change color
colorful flowers
larger overall leaf size
a shorter stem
Answer:
In most plants, the leaves are the main food factories. They capture the sun's energy with the help of chlorophyll in the leaf cells. The chlorophyll traps and packages the energy from the light of the sun in a process called photosynthesis. Leaves usually have a large surface so they can collect the most sunlight.
Explanation:
Hope this helps...maybe
Answer:
C
Explanation:
URGENT: true or false: liquids can be poured from one container to another because there are no attraction forces between atoms or molecules
Answer:
False
Explanation:
It's common sense
Answer:
True
Explanation:
Water doesnot have any definite shape.There is less attraction between particles .Hence water can move one container to anotherWhich of the following incorrectly matches the interaction of light with the
motion of a matter?
O vibrational modes are excited by infrared light
rotational modes are excited by radiofrequency
O the nucleus is excited by gamma radiation
O valence electrons are excited by ultraviolet light
Answer:
b
Explanation:
es
la b
5. Fill in the blanks with either "More," "Less," or "The Same."
a) If an object has more mass than another object, it will accelerate_____
b) In order to accelerate an object more, one would need to apply_____ force.
c) If an equal force is applied to two different objects, the less massive object will accelerate____
Answer:
Explanation:
5. Fill in the blanks with either "More," "Less," or "The Same."
a) If an object has more mass than another object, it will accelerate_less____
b) In order to accelerate an object more, one would need to apply_more____ force.
c) If an equal force is applied to two different objects, the less massive object will accelerate_more___
The answer is less, more and more.
Relationship between mass and accelerationIf an object has more mass than another object, it will accelerate less. In order to accelerate an object more, one would need to apply more force. If an equal force is applied to two different objects, the less mass of an object will accelerate more
The acceleration of an object depends directly on the force acting upon the object, and inversely on the mass of the object.
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Are you an antisocial person. Me honestly am
Explanation:
By the way.. What's the meaning of ANTISOCIAL??..(ㆁωㆁ)
If you tell me the meaning of it, I'll tell you my answer too(ㆁωㆁ)
Please answer this
knvijhbuehguqehguhgnghjnguhsgi0jrgij
Answer: The correct answer is c
Explanation: When heat radiates it is showing moisture and mixed ways they combine
Answer:
the answer is c trust me bruv
Explanation: im smart
please help me i’m stuck on this question
some bird migrate 20000 miles if 1 mile equals 1.5 km calculate the distance there birds fly in km
what produces pressure in a liquid
Answer:
1. The weight of the column of water above
2. Due to Gravity
(I would say there are two answers for this question)
Explanation:
1.
The pressure in a liquid is due to the weight of the column of water above. Since the particles in a liquid are tightly packed, this pressure acts in all directions. For example, the pressure acting on a dam at the bottom of a reservoir is greater than the pressure acting near the top.
2.
Fluid pressure can be caused by gravity, acceleration, or forces in a closed container. Since a fluid has no definite shape, its pressure applies in all directions. Fluid pressure can also be amplified through hydraulic mechanisms and changes with the velocity of the fluid.
Why is water not used as a liquid in glass thermometers?
Explanation:
Because water has no uniform rate of expansion and it vaporizes easy when temperature increases that makes it difficult to read.
Write down the relation between force pressure and area
Answer:
Answer: Pressure is directly proportional to force and inversely proportional to area.
Explanation: Pressure is defined as the ratio of force applied to the area of cross section.
Mathematically,
P=\frac{F}{A}P=
A
F
where,
P = Pressure
F = Force applied
A = Area of cross-section
from above it is visible that pressure is directly proportional to the force applied which means that if force increases, pressure increases. It is also inversely proportional to the area of cross-section. So, when area of cross-section increases, pressure decreases.
The units of pressure are N/m^2N/m
2
and S.I. units for this term is Pascal (P).
Where on the physical activity pyramid do lifestyle activities belong?
Answer:
The physical activity pyramid helps in organizing the person's daily life routine. It separated the exercises into different levels and helps the person to inherit a fit and healthy life style.
a spacecraft that seems to be motionless in deep space is given some type of quick push. which statement describes what will happen?
An applied force applied causes a body such as the spacecraft to move. The magnitude of the force determines the change in the velocity
What will happen to the spacecraft is given by option C. from among the possible question options.
C. The spacecraft will begin to move and it will continue moving until it is stopped by an equal and opposite force
Reason:
The possible question options obtained from a similar question includes;
A. The spacecraft will move for some time then stop slowly
B. Air resistance will prevent the spacecraft from moving
C. The spacecraft will begin to move and the motion will continue until a force equal and opposite to the applied force stops it
D. The quick push will not cause the spacecraft to move, as a quick push works on Earth only
The state of the space craft = Motionless
Location of the spacecraft = Deep space
Type of force applied = Quick push
The statement that describes what will happen = Required
Solution;
Let F, represent the force applied, and let Δt be the duration of the applied force, we have;
The impulse of the force, F × Δt = m·(v₂ - v₁)
Where;
m = The mass of the spacecraft
v₁ = The initial velocity of the spacecraft = 0
v₂ = Final velocity of the spacecraft
Plugging in v₁ = 0, gives;
F × Δt = m·v₂
The space craft is given a velocity, v₂, and according to Newton's First Law of Motion, it continues moving in a straight line until another force acts on it
Therefore, the correct option is option C. The spacecraft will begin to move and the motion will continue until it is stopped by an equal and opposite force
Learn more about Newton's First Law of Motion here:
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Rebecca enjoys taking photos. Her father suggests that she study physical science to help improve her photography. How is physical science related to photography?
Cosmic abundance is made up primarily of what gases?
Answer:
Hydrogen and Helium
Explanation:
The abundance of chemical elements in the universe was made up of large amounts of these 2 gases, the rest made up only about 2% of the universe. Which were produced mostly by supernovae and certain red giant stars
what type of energy results from the burning of wood or gasoline?
Answer:
Chemical energy
Explanation:
Chemical energy is energy stored in the bonds of atoms and molecules. Batteries, biomass, petroleum, natural gas, and coal are examples of chemical energy. Chemical energy is converted to thermal energy when people burn wood in a fireplace or burn gasoline in a car's engine.