CBSE Class 9 Science Describing Motion Around Us (Class 9 NCERT New) Quiz 5

1. To describe velocity you need to know ________.

A speed and direction B speed and time C direction and acceleration D speed and acceleration

2. Displacement is the difference between the initial position and the _______ position of an object.

A positive B resting C motion D final

3. According to the graph, about how long did the object take to move 40 m?

A 2s B 3s C 4s D 5s

4. You travel 200km in 2h. Your __________ speed is 100km/h.

A constant B average C instantaneous D initial

5. A distance vs. time graph shows an object's

A frame of reference B speed C acceleration D favorite food

6. The speed at any single instant of time?

A speed B average speed C instantaneous speed D velocity

7. What is the difference between distance and displacement?

A distance is the total length of the path an object travels. Displacement is the straight line distance from starting point to ending point with a certain direction B displacement is the total length of the path an object travels. Distance is the straight line distance from starting point to ending point. C displacement uses no direction whereas distance does D there is no difference. they are the same!

8. A runner starts at the starting line of a race, and runs 50 m west. She then turns around and heads back to the east, and has run 30 m east when the winner crosses the finish line. What is her distance run at that point?

A 80 m B 20 m C 50 m D 30 m

9. A runner starts at the starting line of a race, and runs 50 m west. She then turns around and heads back to the east, and has run 30 m east when the winner crosses the finish line. What is her displacement at that point?

A 20 m west B 20 m east C 0 m D 30 m west

10. What does it tell you if the dots on a piece of ticker tape are close together?

A The object was moving (relatively) slowly. B The object was moving (relatively) fast. C The object was speeding up. D The object was slowing down. 5 The object wasn't moving at all.