Motion quiz : me i have 80 more questions i have to finish by
1. the term motion means to continuously change position relative to a reference point.
a. true
b. false
2. the speed of a runner is clocked 60 seconds after the beginning of a race. at this point in time the runner is moving at 6 miles per hour at 60 seconds into the race is the runners
a. instantaneous speed
b. average velocity
c. acceleration
3. when motion is changing directions, acceleration is the rate at which changes, but when motion is not changing direction, acceleration may be expressed as the rate at which changes.
a. speed, time
b. velocity, speed
c. elapsed time, average speed
4. a runner runs 10 miles in 1 hour, her average speed per minute is 1 mile.
a. true
b. false
5. two objects can have the same speed but different velocities.
a. true
b. false
6. if a runner runs at 6 miles per hour, she can cover one half of a mile in 5 minutes.
a. true
b. false
7. use the 1st graph shown to answer the question:
what is the average velocity of the object represented by the graph.
a. 1 km/hr
b. 5 km/hr
c. 30 km/6 hr
8. use the 2nd graph shown to answer the question:
study the graph. which of the following statements is true about this graph?
a. an object is accelerating
b. an object is traveling at a constant velocity
c. an object is in free fall
9. use this graph to answer the question:
what is the maximum velocity depicted on the graph?
a. 10cm/s
b. 13cm/s
c. 20cm/s
10. imagine a rock is dropped from the top of a tall building. after 2 seconds of falling, the rocks instantaneous speed is approximately 20m/s.
a. true
b. false