Mechanics 1 Quizzes: Test Your Understanding of Motion, Forces, and Energy

Question 1

Calculate the kinetic energy of a 1000-kilogram car moving at 10 meters per second.

Accepted Answer

50 kilojoules

Answer

1 kilojoule

Answer

5 kilojoules

Answer

500 kilojoules

Question 2

A particle moves in a straight line with an acceleration of 2 meters per second squared. If the particle's velocity is 5 meters per second at time equals zero, what is its velocity after 3 seconds?

Accepted Answer

11 m/s

Answer

2 m/s

Answer

5 m/s

Answer

15 m/s

Question 3

A car with a mass of 1200 kg is traveling at 10 m/s. The driver applies a constant force of 2000 N in the direction of motion for 10 seconds. What is the final velocity of the car?

Accepted Answer

26.7 m/s

Answer

20 m/s

Answer

30 m/s

Answer

40 m/s

Question 4

Determine the kinetic energy of a 10 kg block moving at a velocity of 5 m/s.

Accepted Answer

50 J

Answer

25 J

Answer

100 J

Answer

200 J

Question 5

A car of mass 1000 kg is travelling at a speed of 20 m/s when it applies brakes and comes to rest in a distance of 50 m. What is the braking force?

Accepted Answer

4000 N

Answer

1000 N

Answer

2000 N

Answer

8000 N

Question 6

For a rigid body to be in equilibrium, which of the following statements about the forces acting on it is true?

Accepted Answer

The vector sum of the forces is zero.

Answer

The forces have equal magnitudes.

Answer

The forces act in the same direction.

Answer

The forces are applied at the same point.

Question 7

A force of 10 N is applied to a mass of 2 kg. What is the acceleration of the mass?

Accepted Answer

2 m/s²

Answer

5 m/s²

Answer

10 m/s²

Answer

20 m/s²

Question 8

A block of mass 2 kg is sliding on a rough horizontal surface with a coefficient of kinetic friction of 0.2. What is the force of kinetic friction acting on the block?

Accepted Answer

4 N

Answer

2 N

Answer

8 N

Answer

16 N

Question 9

A projectile is launched at an angle of 60 degrees above the horizontal with an initial velocity of 20 m/s. Determine the horizontal and vertical displacements of the projectile after 2 seconds.

Accepted Answer

10m, 17.32m

Answer

20m, 10m

Answer

17.32m, 20m

Answer

10m, -17.32m

Question 10

Which of the following is the correct unit of energy?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Kelvin

Question 11

Which of the following is a vector quantity?

Accepted Answer

Acceleration

Answer

Speed

Answer

Mass

Answer

Temperature

Question 12

A block of mass 2 kg is sliding down a frictionless inclined plane at an angle of 30° to the horizontal. What is its acceleration down the plane? (Neglect air resistance.)

Accepted Answer

2.45 m/s²

Answer

4.9 m/s²

Answer

9.8 m/s²

Answer

14.7 m/s²

Question 13

An object is thrown vertically upwards with an initial velocity of 10 m/s. What is its velocity at the highest point of its trajectory?

Accepted Answer

0 m/s

Answer

10 m/s

Answer

-10 m/s

Answer

5 m/s

Question 14

Identify the conservative force from the following:

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Magnetic force

Question 15

Define the SI unit of work.

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Metre

Question 16

Which of the following is a unit of power?

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Metre per second

Question 17

What condition must be met for an object to be in equilibrium?

Accepted Answer

Net force and net torque are both zero

Answer

Net force is zero but net torque is non-zero

Answer

Net force is non-zero but net torque is zero

Answer

Both net force and net torque are non-zero

Question 18

A force of 10 N is applied to a mass of 2 kg. What is the resulting acceleration?

Accepted Answer

2 m/s^2

Answer

5 m/s^2

Answer

10 m/s^2

Answer

20 m/s^2

Question 19

A particle moves on a circular path of radius "r" with constant speed "v". What is the centripetal acceleration of the particle?

Accepted Answer

v^2/r

Answer

v/r

Answer

r/v

Answer

r^2/v

Question 20

A body is undergoing uniform acceleration. Which of the following graphs best represents the velocity-time graph of the body's motion?

Accepted Answer

A straight line inclined to the time axis

Answer

A horizontal line parallel to the time axis

Answer

A parabola

Answer

A circle

Question 21

A particle is moving in a uniform circular motion. Is work done by the centripetal force acting on the particle?

Accepted Answer

No, zero work

Answer

Yes, positive work

Answer

Yes, negative work

Answer

Cannot be determined

Question 22

A wave with a wavelength of 0.5 meters travels at 4 Hertz. What is the wave's speed?

Accepted Answer

2 meters per second

Answer

1 meter per second

Answer

4 meters per second

Question 23

Which of the following is considered a vector quantity?

Accepted Answer

Velocity

Answer

Speed

Answer

Temperature

Answer

Mass

Question 24

Identify the unit of power.

Accepted Answer

Watt

Answer

Joule

Answer

Newton

Answer

Meter

Question 25

Which of the following is a conservative force?

Accepted Answer

Gravitational force

Answer

Air resistance

Answer

Friction

Answer

Tension in a rope

Question 26

A body of mass 'm' is moving with a constant velocity 'v'. Which of the following expressions represents the kinetic energy of the body?

Accepted Answer

½ mv²

Answer

½ m²v

Answer

mv²

Answer

2mv²

Question 27

Identify the force that is conservative among the following options:

Accepted Answer

Gravitational force

Answer

Frictional force

Answer

Tension force

Answer

Air resistance

Question 28

Which of the following physical quantities is not a vector?

Accepted Answer

Speed

Answer

Acceleration

Answer

Velocity

Answer

Force

Question 29

A 2 kg block is placed on a rough horizontal surface with a coefficient of friction of 0.5. Determine the force required to move the block at a constant velocity.

Accepted Answer

10 N

Answer

5 N

Answer

20 N

Answer

15 N

Question 30

Identify the SI unit of energy.

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Answer

Kilogram

Question 31

A particle is moving in a straight line with an initial velocity v and a constant acceleration a. Which of the following expressions gives the distance traveled by the particle in time t?

Accepted Answer

v*t + 1/2*a*t^2

Answer

v*t - 1/2*a*t^2

Answer

a*t - 1/2*v*t^2

Answer

a*t + 1/2*v*t^2

Question 32

A block of mass 5 kg is resting on a frictionless inclined plane with an angle of inclination of 30 degrees. What is the magnitude of the force acting on the block parallel to the plane?

Accepted Answer

5*9.81*sin(30) ~ 24.5 N

Answer

5*9.81 ~ 49 N

Answer

0 N

Answer

5*9.81*cos(30) ~ 42.2 N

Question 33

A block of mass 5 kg is pushed across a rough surface by a force of 10 N. The coefficient of kinetic friction between the block and the surface is 0.2. What is the acceleration of the block?

Accepted Answer

(10 - 0.2*5*9.81)/5 = 3.924 m/s^2

Answer

10/5 - 0.2*5*9.81 = 8.81 m/s^2

Answer

10/5 + 0.2*5*9.81 = 16.81 m/s^2

Answer

(0.2*5*9.81 - 10)/5 = -1.962 m/s^2

Question 34

A projectile is launched at an angle of 45 degrees to the horizontal with an initial velocity of 20 m/s. What is the horizontal range of the projectile?

Accepted Answer

20^2*sin(2*45)/9.81 ~ 28.28 m

Answer

20^2*sin(45)/9.81 ~ 20 m

Answer

20^2*tan(45)/9.81 ~ 24.25 m

Answer

20^2*cos(45)/9.81 ~ 14.14 m

Question 35

A car accelerates uniformly from rest to a speed of 20 m/s in 5 seconds. What is the car's acceleration?

Accepted Answer

4 m/s²

Answer

2 m/s²

Answer

0.25 m/s²

Answer

100 m/s²

Question 36

A ball is thrown vertically upwards with an initial velocity of 10 m/s. What is the maximum height the ball reaches?

Accepted Answer

5.1 m

Answer

20 m

Answer

1 m

Answer

10 m

Question 37

A force of 10 N acts on a mass of 2 kg. What is the acceleration of the mass?

Accepted Answer

5 m/s²

Answer

10 m/s²

Answer

0.2 m/s²

Answer

20 m/s²

Question 38

A 5 kg object is lifted vertically upwards at a constant speed of 2 m/s. What is the work done by the lifting force in 3 seconds?

Accepted Answer

30 J

Answer

10 J

Answer

150 J

Answer

60 J

Question 39

A car of mass 1000 kg is travelling at a speed of 20 m/s. What is the car's kinetic energy?

Accepted Answer

200,000 J

Answer

10,000 J

Answer

50,000 J

Answer

400,000 J

Question 40

A 10 kg object is raised to a height of 5 meters. What is the object's gravitational potential energy?

Accepted Answer

490 J

Answer

50 J

Answer

100 J

Answer

250 J

Question 41

A ball is released from rest and falls freely under gravity. What is the ball's acceleration?

Accepted Answer

9.8 m/s²

Answer

4.9 m/s²

Answer

0 m/s²

Answer

1 m/s²

Question 42

A 50 N force acts on an object for 10 seconds. What is the impulse of the force?

Accepted Answer

500 Ns

Answer

5 Ns

Answer

500 N

Answer

50 Ns

Question 43

A car of mass 1000 kg collides head-on with a stationary car of mass 500 kg. The two cars stick together after the collision. What is the velocity of the combined wreckage immediately after the collision?

Accepted Answer

6.67 m/s

Answer

5 m/s

Answer

10 m/s

Answer

3.33 m/s

Question 44

A ball is thrown horizontally from a cliff with an initial velocity of 10 m/s. The ball takes 2 seconds to reach the ground. What is the horizontal distance travelled by the ball?

Accepted Answer

20 m

Answer

40 m

Answer

10 m

Answer

5 m