Kinematics: Motion in One and Two Dimensions - Physics Year 13

Question 1

A car moves with a velocity of 20 m/s east. If the car turns left and travels 30 m north, what is its resultant displacement?

Accepted Answer

36.06 m at 56.3° north of east

Answer

10 m northwest

Answer

30 m northeast

Answer

50 m at 36.9° north of east

Question 2

Which of the following represents the SI unit of velocity?

Accepted Answer

m/s

Answer

m

Answer

m/s²

Answer

ms

Question 3

Which of the following equations represents the centripetal force acting on an object moving in a circular path?

Accepted Answer

F = mv²/r

Answer

F = ma

Answer

F = GmM/r²

Answer

F = kx

Question 4

A car travels 120 km and takes 2 hours to complete the journey. Calculate the average speed of the car.

Accepted Answer

60 km/h

Answer

120 km/h

Answer

240 km/h

Answer

30 km/h

Question 5

A car journeys with a continual velocity of 20 m/s for 10 seconds. Determine the displacement of the car during this period.

Accepted Answer

200 m

Answer

10 m

Answer

50 m

Answer

40 m

Question 6

A ball is released from a height of 10 m. Determine its velocity immediately before impact with the ground.

Accepted Answer

14 m/s

Answer

7 m/s

Answer

20 m/s

Question 7

An object is moving with a velocity of 10 m/s at an angle of 30° above the horizontal. Determine the horizontal component of the velocity.

Accepted Answer

8.66 m/s

Answer

5 m/s

Answer

15 m/s

Answer

12 m/s

Question 8

The velocity-time graph of an object shows a horizontal line. What does this indicate?

Accepted Answer

The object is moving with constant speed.

Answer

The object is moving with constant acceleration.

Answer

The object is at rest.

Answer

The object is moving with increasing acceleration.

Question 9

An object is moving in a circle with radius 'r'. If its velocity is 'v', what is its centripetal acceleration?

Accepted Answer

v² / r

Answer

vr

Answer

r / v

Answer

v / r

Question 10

Which of the following is a vector quantity?

Accepted Answer

Displacement

Answer

Time

Answer

Mass

Answer

Temperature

Question 11

A car is traveling at 30 m/s when the driver applies the brakes, causing the car to decelerate uniformly. If the car comes to a stop after traveling 50 meters, what is the car's acceleration?

Accepted Answer

-9 m/s²

Answer

-6 m/s²

Answer

-12 m/s²

Answer

-3 m/s²

Question 12

A car is traveling at 20 m/s on a straight road. The driver applies the brakes, causing the car to decelerate at a rate of 5 m/s². What is the car's displacement after 10 seconds?

Accepted Answer

100 m

Answer

50 m

Answer

150 m

Answer

200 m

Question 13

A car travels 100 km east, then 50 km south. What is the magnitude of the car's displacement?

Accepted Answer

111.8 km

Answer

150 km

Answer

100 km

Answer

50 km

Question 14

A ball is thrown vertically upwards with an initial velocity of 20 m/s. What is the ball's velocity at its highest point?

Accepted Answer

0 m/s

Answer

10 m/s

Answer

-20 m/s

Answer

20 m/s

Question 15

A car accelerates uniformly from rest to a speed of 25 m/s in 5 seconds. What is the car's acceleration?

Accepted Answer

5 m/s²

Answer

0.2 m/s²

Answer

10 m/s²

Answer

125 m/s²

Question 16

A ball is dropped from a height of 10 meters. How long does it take to reach the ground? (Assume g = 10 m/s²)

Accepted Answer

1.41 seconds

Answer

2 seconds

Answer

1 second

Question 17

A projectile is launched horizontally from a cliff with an initial speed of 10 m/s. What is the projectile's vertical acceleration?

Accepted Answer

9.8 m/s² downwards

Answer

10 m/s² upwards

Answer

0 m/s²

Answer

10 m/s² downwards

Question 18

A car travels in a circle with a constant speed. Which of the following statements is true about its acceleration?

Accepted Answer

The car has a constant acceleration directed towards the center of the circle.

Answer

The car has no acceleration.

Answer

The car has a constant acceleration in the direction of its motion.

Question 19

A graph of velocity versus time for an object shows a straight line with a negative slope. What can be concluded about the object's motion?

Accepted Answer

The object is moving with a constant negative acceleration.

Answer

The object is moving with a constant positive velocity.

Answer

The object is at rest.

Question 20

A student throws a ball straight up in the air. Which of the following statements is true about the ball's acceleration during its upward motion?

Accepted Answer

The acceleration is constant and downwards.

Answer

The acceleration is zero.

Answer

The acceleration is constant and upwards.

Answer

The acceleration is variable.

Question 21

A car travels 50 km in 1 hour. What is the car's average speed?

Accepted Answer

50 km/h

Answer

25 km/h

Answer

0 km/h

Answer

100 km/h

Question 22

A runner completes a 100-meter race in 10 seconds. What is the runner's average velocity?

Accepted Answer

10 m/s

Answer

5 m/s

Answer

0 m/s

Answer

100 m/s