Sample Questions

Question 1: What are the two types of linear motion?

Answer:

Linear motions is of two types, they are

1. Rectilinear motion.
2. Curvilinear motion.

RectiIinear Motion:

Rectilinear motion is defined as a phenomenon in which a body is moving only along a straight line. It is one type of linear motion.

Example:

• Falling of objects from certain height.

Curvilinear Motion:

Curvilinear motion is defined as the motion of the l objects moving in a circular path.

Example: 

• Motion of earth around the sun.

Question 2: Does motion have any units.

Answer:

No  motion does not have any units, because motion is not a physical quantity and thus it cannot be measured. So it does not have any units.

Question 3: A man is moving in a car with a velocity of 8 m/s, then he suddenly stops the car. Does he brake to stop completely with an acceleration of -4m/s²?

Answer:

Given that,

Initial velocity u = 8m/s

Final velocity v = 0 m/s

Acceleration a = – 4m/s²

From kinematics formula,

v² = u² + 2ad

0² = 8² + 2 × (-4) × d

64 – 8d = 0

8d = 64

d = 64/8

= 2 m

Therefore, the distance travelled by man in car is 2 m. 

Question 4: A ball is moving with a velocity of 19 m/s for a distance of 120 m. Find the time taken to reach that distance?

Answer:

Given that,

Initial velocity u = 10 m/s

Final velocity v=  0 m/s

distance travelled d = 120 m

From equation of motion,

d = (v + u)t/2

120 = (0 + 10)t/2

120 × 2 = 10t

240 = 10t

t = 240/10

= 24 s

Therefore the time taken to reach that distance is 24 s.

Question 5: A car is moving at 20m/s speed up to 60 m/s in 8 sec. Find the acceleration of the car?

Answer:

Given that,

Initial velocity u = 20 m/s

Final velocity v=  60 m/s

Time t = 8 sec

From equation of motion,

v = u + at

60 = 20 + a × 8

60 – 20 = 8a

8a = 40

a = 40/8

a= 5 m/s².

Therefore, the acceleration of the car is 5 m/s².

Question 6: An object is thrown from a building with a constant acceleration of 20m/s². Find the speed after 5 sec when it was dropped.

Answer:

Given that,

Initial velocity u = m/s

acceleration a = 20m/s².

Time t = 5 sec

From equation of motion,

v = u + at

v = 0 + 20 × 5

v = 100m/s.

Therefore, the speed after 5 sec is 100 m/s.

The free movement of an object in relation to time is known as motion. It can be described as the act of shifting one’s position. For instance, a moving train, a rotating fan, a rolling ball, and so forth. Even though the planet is always in motion, there are several sorts of motion that will help you grasp things more thoroughly.