Objects and Motion

Which line on the following graph represents a constant speed?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

The size of the acceleration acting on an object of mass 10 kg that has a net force of 3 N acting on it will be:

• 3.33 m/s².

• 30 m/s².

• 0.3 m/s².

• 13 m/s².

Tags

NGSS.MS-PS2-2

An object starts from rest and accelerates at 5 m/s/s. After 4 seconds, its speed will be:

• 0

• 20 m/s

• 10 m/s

• 30 m/s

The tendency of an object to resist changes in its motion is called:

• inertia

• friction

• work

• weight

When you hit a tennis ball with a tennis racquet, the action force is the force of the racquet hitting the ball and the reaction force is:

• the jarring force you feel through your hand

• the weight force on you

• the weight force on the ball

• the ball hitting the racquet

Tags

NGSS.MS-PS2-1

How long would a car travelling at a speed of 60 km/h take to cover a distance of 90 km?

• 2½ hours

• 3½ hours

• 1½ hours

• 4½ hours

The change in position of an object and its direction is known as:

• average speed

• displacement

• average velocity

• distance

A cyclist has a weight of 500 N, the road pushes up with 500 N, the thrust force is 30 N and the drag is 32 N. The cyclist will be:

• decelerating

• accelerating

• travelling at constant velocity

• stationary

Tags

NGSS.MS-PS2-2

An object is acted upon by a thrust force of 50 N and a total frictional force of 40 N. The net force will be:

• 90 N backwards

• 90 N forwards

• 10 N forwards

• 10 N backwards

Tags

NGSS.MS-PS2-2

Calculate the average speed of a runner who runs 500 m in 80 seconds.