Question

1.The acceleration of an object is equal to the rate of change of its position the...

1.The acceleration of an object is equal to

the rate of change of its position

the rate of change of its velocity

the rate of change of its speed only

the time an object has been in motion

2.

What two forms of energy does a rollercoaster transfer between?

Applied force to gravitational force

Normal force to friction force

Air resistance force to tension force

Potential energy to kinetic energy

3.

What is the amount of matter an object contains?

Mass

Density

Weight

Internal force

Science   Physics   
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Homework Answers

Answer #1

Ans:-1

Acceleration is the rate of change of velocity of any object. To change the velocity of any object, we need to change its kinetic energy by doing work with application of force. This force causes acceleration of body. This acceleration changes velocity of object.

Ans:-2

Rollercoaster motion is due to transfer of two energies into one another. Kinetic energy is converted to potential energy when it goes up and again this potential energy is changing into kinetic energy while roller is going down. If no resistive forces then energy is conserved.

Ans:-3

Mass is called the amount of matter an object contains. As weight is mass multiply gravity of planet.

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