Force and motion

The only physical quantity that could cause motion is called

• speed

• velocity

• energy

• force

Push and pull are types of

• Remote (non-contact) force

• Mechanical ( contact) force

• Energy

• Mass

If an object went forward 50 meters in 5 seconds, Its velocity would then be

• 500 m/s

• 10 km/s

• 10 m/s

• 10 km/min

If an object went forward 50 meters in 5 seconds, the velocity diagram for this motion would be

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If an object went backward 50 meters in 5 seconds, the velocity diagram for this motion would be

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If an object stood still for the duration of 5 seconds, the velocity diagram for this motion would be

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this diagram means

• the object went forward 50 meters in one second, then stood still for two seconds, went backwards 30 meters in one second, stood still for one second then went backwards 20 meters in three seconds.

• the object went forward 60 meters in one second, then stood still for three seconds, went backwards 20 meters in one second, stood still for one second then went backwards 10 meters in three seconds.

• the object went forward 30 meters in one second, then stood still for ten seconds, went backwards 30 meters in one second, stood still for one second then went backwards 20 meters in three seconds.

• the object did not move at all for 10 seconds.

the average speed for this object is

• 100 m/7 s = 14.28 m/s

• 200 m/7 s = 24.28 m/s

• 100 m/7 s = 14.28 km/hour

• 10 m/s

for how long did this object stay still?

• 2 seconds only

• 3 seconds only

• an hour and 15 minutes

• 34.2 sends

how far did this object move forward?

• 20 meters only

• 13 kilometers only

• 17 inches

• 50 meters only