(1) Two cars going in the same direction at the same speed are at rest relative to each other.

(2) If a ball is falling from a height, it will fall with a uniform speed.

(3) Speed = Distance × Time

(4) An object can have two types of motion at the same time.

(5) In top sporting events wrist watches are used to measure time.

(6) The flight of an insect can be called random motion.

(8) Weight of a body is constant but mass is not.

(9) In uniform motion same distance must be covered in same time interval.

(10) The unit of weight is newton (N).

(7) Amplitude is the maximum displacement of a simple pendulum.

(2) Another name for vibratory motion is ____________.

(3) A cyclist moving in a crowded market will have ____________ motion.

(4) A boy sitting on a merry go round has a ____________ motion.

(5) A boy playing football is an example of ____________ motion.

(7) Motion of a swinging pendulum and a guitar string are ____________.

(8) Motion of the hands of a clock is called ____________.

(9) Weight of a body is the force exerted in ____________ direction.

(6) The motion used to make clock and watches is called ____________.

(1) When a body moves about a fixed axis the body is in ____________ motion.

(2) A car travels a distance of 240 km in 4 hours. Calculate its speed.

(4) What is periodic motion?

(6) Are mass and weight synonymous? Explain.

(8) How is average speed calculated?

(1) Give two example of uniform motion.

(3) The distance between two stations is 324 km. How much time it will take to cover this distance at an average speed of 18 km/h?

(5) What are the S. I. units of speed, mass and weight?

(7) How can we say that a body is at rest?

(9) What kind of motion do the pedals of a bicycle have?

(1) Differentiate between motion and rest.

(3) Differentiate between periodic and non-periodic motion.

(5) How can you differentiate between translatory motion and rotatory motion?

(6) How can one improve the average speed of a vehicle? Explain giving an example.

(7) Differentiate between uniform and non-uniform motion.

(9) State three differences between mass and weight.

(2) Name different kinds of motion giving examples for each.

(4) Name two instruments that produce music by vibration. Explain vibration.

(8) Explain the motions of a carpenter's drill.

(10) Find the total distance covered by a car in 30 minutes that moves with a uniform speed of 60 km/h for the first 10 minutes and then with speed of 50 km/h for the rest of the journey.

Periodic motion

Circulatory and translatory

10.4

Mass of a body is constant but its weight is not.

66.6 km/hr

The body should change its position with respect to a stationary object in a span of time.

Has all the points of the body moving the same distance along the same path, in the same time.

Rectilinear motion