Motion and forces

What is your average speed if you take 0.5 h to jog 4,000 m?

• 8000 m/h
• 2000 m/h
• 0.000125 m/h
• 800 m/h

Changing the speed and changing the direction of your bicycle are both examples of acceleration.

• TRUE
• FALSE

What two things must you know to determine speed?

• distance and direction

• direction and time

• speed and direction

• time and distance

Which of the following is a measurement of velocity?

• 16 m east
• 25 m/s2
• 55 m/h south
• 60 km/h

8 N to the left , and 4 N to the right. Find the net force. Is this balanced?

• 12 N Right;  No
• 4 N Left;  No
• 12 N Right;  Yes
• 4 N Left;  Yes

A crate is dragged across an ice covered lake. The box accelerates at 0.08 m/s/s and s pulled by a 47 N force. What is the mass of the crate?

• 587.5 kg

• 642.8 kg

• 58.75 kg

• 98.81 kg

A golf ball accelerates off a tee at 15m/s², changing its velocity from 0m/s to 50 m/s down the fairway. How long did it take the golf ball to accelerate?

• 750 seconds
• 35 seconds
• 0.3 seconds
• 3.3 seconds

A 68 kg runner exerts a force of 59 N. What is the acceleration of the runner?

• 9.8 m/s/s

• 5 m/s/s

• 1.968 m/s/s

• 0.868 m/s/s

A train has a mass of 18181.81 kg... What is the weight?

• 178,182 N

• 1855.29 N

• 163,636.29 N

• 161,818.109 N

Solve:
(6 x 10⁶) / (2 x 10³)

• 12 x 10³
• 3 x 10⁹
• 1.2 x 10⁴
• 3 x 10³