Free Printable Chapter 5-7 Quiz

1.

A ball is dropped from a height and falls freely. The gain in kinetic energy of the ball is

a)

directly proportional to the distance fallen

b)

directly proportional to the gain in the speed

c)

equal to the potential energy of the ball

d)

equal to the work done against air resistance

2.

A mass m is stationary on a smooth horizontal surface. The mas is then pushed by a constant force F. The work done by the force F in a time t is

a)

$Fmt^2$

b)

$\frac{Ft^2}{m}$

c)

$\frac{2Fm}{t}$

d)

$\frac{F^2t^2}{2m}$

3.

A body of mass m moves up a smooth inclined at an angle of

\theta

with the horizontal with uniform acceleration

a

What is the power developed by the body when its velocity is v?

a)

$mavg\sin\ \theta$

b)

$mav\sin\theta+mgv$

c)

$mav+mgv\sin\theta$

d)

$\left(mav+mgv\right)\sin\theta$

4.

A particle moves with uniform speed, v in a circle of radius, r. The period of the circular motion is T. What is the acceleration of the particle when it moves from one end X of a diameter to the other end Y?

a)

Zero

b)

$\frac{v^2}{r}$

c)

$\frac{2v}{T}$

d)

$\frac{v}{2T}$

5.

A stone at the end of a string is whirled in a horizontal circle on a smooth surface with increasing speed. If the string snaps when the stone is at P as shown in the figure, in which direction would the stone move?

a)

A

b)

B

c)

C

d)

D

6.

A mass at the end of a string moves in a vertical circle of radius, R. Which of the following is the correct expression for the minimum angular velocity, $\omega$ of the stone at the highest point P for it to complete the vertical circle?

a)

$\omega=gR$

b)

$\omega=\sqrt{gR}$

c)

$\omega=\sqrt{\frac{g}{R}}$

d)

$\omega=\sqrt{\frac{R}{g}}$

7.

A bob of mass, m is moving in a horizontal circle of radius, r with an angular velocity of $\omega$ . The tension in the string is T. What is the resultant force on the bob?

a)

$mr\omega^2$

b)

$T\cos\theta$

c)

$T\cos\theta+mr\omega^2$

d)

$T\sin\theta-mr\omega^2$

8.

The gravitational acceleration of a particle P of mass m on another particle Q of mass 2m is F. What is the gravitational attraction of particle Q on particle P?

a)

0.25F

b)

0.5F

c)

F

d)

2F

9.

A satellite drops to a lower orbit. Which statement about the satellite in the new orbit is correct?

a)

Speed is lower

b)

The period of orbit is shorter

c)

Its gravitational potential energy increases

d)

Its total energy increases

10.

An object moving in a circle at a constant speed is

a)

accelerating in the direction of motion

b)

accelerating towards the centre of the circle

c)

accelerating away from the centre of the circle

d)

not accelerating because its speed is constant

11.

Which of the following statements about a uniform gravitational field is true?

a)

Magnitude is the same in all directions

b)

The gravitational potential is the same for all points within it

c)

Its direction is opposite to the direction of motion of a test mass released in it

d)

Its field strength is the same at all points within it

12.

Which of the following situations has work done

a)

Carry a football across the field

b)

Picking up a book from the floor

c)

Pushing a wall

d)

Standing still

Chapter 5-7 Quiz

Total questions: 12

Worksheet time: 6mins

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