Checkpoint: time, pendulums and speed

A pendulum takes 30 s for 10 oscillations. What is its time period?

• 3 s
• 20 s
• 300 s

A cyclist covers 450 m in 90 s. What is the speed?

• 0.2 m/s
• 40 500 m/s
• 5 m/s

A speed is 72 km/h. What is it in m/s?

• 259.2 m/s
• 7.2 m/s
• 20 m/s

In each of three 5 s periods, a car covers 20 m. What kind of motion is this?

• No motion
• Uniform
• Non-uniform

A bus covers 100 km in 2 h. Then it covers 80 km in 2 h. What is its average speed?

• 50 km/h
• 45 km/h
• 40 km/h