1Kinematics:DescribingMotion

An object moves directly from X to Z.

In a shorter time, a second object moves from X to Y to Z. Which statement about the two objects is correct for the journey from X to Z?

• they have the same average speed

• they have the same average velocity

• they have the same displacement

• they travelthe same distance

The distance travelled in a particular direction can also be called ...

• Speed

• Acceleration

• Velocity

• Displacement

The variation with time t of the distance s moved by a body is shown in the graph. What can be deduced from the graph about the motion of the body?

• it accelerates continuously

• it starts from rest

• the distance is proportional to time

• the speed changes

A car at rest in a traffic queue moves forward in a straight line and then comes to rest again. The graph shows how the car’s displacement varies with time.

Whatis its speed while itis moving?

• 0.70

• 0.80

• 1.25

• 1.40

A person walks 50 meters north, then 20 meters west. What is the person's total displacement from the starting point?

• 54 meters, 22° west of north

• 70 meters, 22° west of north

• 54 meters, 68° west of north

• 70 meters, 68° west of north

Which of the following pairs contains one vector and one scalar quantity?

• displacement and distance

• displacement and velocity

• distance and speed

• speed and time

A car travels 60 km north in 2 hours and then 80 km east in 3 hours. What is the car's average velocity in magnitude and direction over the entire trip?

• 100 km/h, 53° north of east

• 100 km/h, 37° north of east

• 20 km/h, 37° north of east

• 20 km/h, 53° north of east

Displacement and velocity are vector quantities. A vector quantity has both magnitude and ...

Name scalar quantity that corresponds to velocity

In a race, a child runs 500m in 4 minutes and 20 seconds. Calculate the average speed of the child ... m/s

• 150

• 1.92

• 2.43

• 20