Representing motions by motion diagrams.

An object travels 120m in 10 sec . What is the average speed of the object?

• 12 m/s

• 6 m/s

• 2 m/s

• 0 m/s

A bird is moving to the east in a straight line. if the bird cover 60 m in each interval. describe its motion

• the bird slowing down

• the bird speeding up

• the bird moves with constant speed

• the bird moving to the east. in a curve path.

look at the motion diagram of the runner . which is the best sentence to describe his motion?

• he is moving east with constant speed.

• he is moving on a straight line to the east , he is speeding up.

• he is moving on a straight line to the west , he is speeding up.

• he is moving on a straight line , he is slowing down.

the model particle below shows the motion of this runner. what is the best answer to describe his motion?

• he is moving to the east in straight line with constant speed.

• he is moving to the west in straight line with constant speed.

• he is moving west and speeding up in a straight line

• he is slowing down in a straight line to the east.

the pictures below shows the particle model for two runners in racing competition. the time interval is the same for both. Explain which runner is faster?

• both has same speed because they cover the same distance.

• A is faster he because he covered 160m in more time

• both reached together. so we can't find who is faster.

• B is faster . because he cover the same distance in less time.