Motion

Question 1

Motion

Answer 1

Movement of an object from one place to another is called motion.

Question 2

Distance

Answer 2

The length of the total path covered by an object is called as distance. It’s SI Unit is metre.

Question 3

Displacement

Answer 3

The shortest distance between the initial position and final position of an object is called as displacement. It’s SI Unit is metre.

Question 4

Uniform Motion

Answer 4

If equal distance is covered in equal interval of time, then motion is said to be uniform.

Question 5

Non-Uniform Motion

Answer 5

If unequal distance is covered in equal interval of time, then motion is said to be non-uniform.

Question 6

Speed

[Give its definition, unit and formula ]

Answer 6

Speed is the distance traveled per unit of time. It’s SI Unit is m/s.

• Speed = distance / time

[ It is how fast an object is moving. ]

Question 7

Velocity

[Give its definition, unit and formula ]

Answer 7

Velocity is the distance traveled per unit of time in a given direction. It’s SI Unit is m/s.

• Velocity = displacement / time
• Average Velocity = (u+v)/2

Question 8

Acceleration

[Give its definition, unit and formula ]

Answer 8

Acceleration is the change in velocity of an object per unit time. It’s SI Unit is m/s².

• Acceleration = Δv / time
• a = (v-u)/t

Question 9

Uniform Circular Motion

Answer 9

When an object moves in a circular path with uniform speed.

Speed = (2πr) / time