Homework Practice

Printable assignment

Kinetic and Potential Energy: Motion and Height

Section A: Energy and Kinetic Energy

Question 1mcq

Energy is the capacity to do what?

A.Only create mass

B.Do work

C.Stop motion always

D.Remove force

Question 2mcq

A moving car mainly has which form of energy?

A.Kinetic energy

B.Potential energy only

C.No energy

D.Chemical energy only

Question 3mcq

Kinetic energy is the energy possessed due to what?

A.Shape only

B.Colour

C.Height only

D.Motion

Question 4mcq

Which expression gives kinetic energy?

KE=Fs

KE=W/t

KE = \frac{1}{2}mv^2

KE=mgh

Question 5mcq

2\,kg

object moving at

3\,m/s

has kinetic energy?

3\,J

9\,J

18\,J

6\,J

Question 6mcq

If speed doubles, kinetic energy becomes?

A.Four times

B.Double

C.Same

D.Half

Section B: Potential Energy and Conservation

Question 7mcq

Gravitational potential energy at a height is mainly due to what?

A.Only temperature

B.Only sound

C.Only motion

D.Position above ground

Question 8mcq

Which expression gives gravitational potential energy?

PE=W/t

PE=\frac12mv^2

PE = mgh

PE=ma

Question 9mcq

5\,kg

object is lifted

2\,m

with

g=10\,m/s^2

. what is its gravitational potential energy?

10\,J

100\,J

50\,J

250\,J

Question 10mcq

During free fall, gravitational potential energy mainly changes into what?

A.Kinetic energy

B.Nuclear energy

C.No energy

D.Chemical energy

Question 11mcq

What does the law of conservation of energy state about energy?

A.Is always destroyed

B.Cannot change form

C.Exists only in moving objects

D.Can change form but total remains constant

Question 12mcq

What should a falling-ball energy model show?

A.Mass disappearing

B.Only sound energy always

C.PE decreasing and KE increasing

D.Both becoming zero immediately