MYP (5) Homework

Your name:

1- the ratio between total distance and total time equals

• instantaneous velocity
• instantaneous speed
• average speed
• average velocity

2- the unit (m/s) is the unit of measuring

• displacement * time
• displacement per time
• velocity * time
• velocity per unit time

3- a cyclist takes a ride lasting 25 s. the diagram shows how her distance traveled from the starting position varies with time. What is her average speed for the whole ride?

• 6 m/s
• 7.5 m/s
• 11 m/s
• 10 m/s

4- The speed - time graph represents a short journey. which distance - time graph represents the same journey?

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5- A woman walks for 4 min directly north with an average velocity of 6 m/s; then she walks eastwards at 4 km/h for 10 min. Then her average speed for the trip and average velocity for the entire trip?

• 9 km/h and 6.8 km/h
• 5.57 km/h and 4.332 km/h
• 4.332 km/h and 4.57 km/h
• 3.332 km/h and 4.57 km/h

6- A car has started motion from rest at uniform acceleration 2 m/s2. after moving a distance of 0.1 km, the driver turned the engine off. The car stopped 5 s afterwards. Find the acceleration and the distance moved during these 5 s?

• - 3 m/s2 and 55 m
• 4 m/s2 and 50 m
• -4 m/s2 and 50 m
• 5 m/s2 and 100 m

7- A car starts to move from rest with a constant acceleration in a straight line. After 1 s, another identical car starts to move from rest with the same constant acceleration in the same straight line. As time moves forwards, what will happen to the distance between the two cars?

• It will remain constant.
• It will equal zero.
• It will decrease.
• It will increase.

8- A car manufacturer produces cars which can accelerate from rest to 100 km/h in 2 s. What time does it take one of her cars to cover a distance of 150 m starting from rest?

• 4.6 s
• 6 s
• 1.3 s
• 2.4 s