Measuring acceleration analysis (v = s ÷ t, a = Δv ÷ t)

12 questions

1. A student measures the time taken for a toy parachute to fall from a particular height. She repeats the measurement and gets these results: 1.60 s, 1.53 s, 1.52 s. The mean time taken is ___ s.
2. A toy car travels at a constant velocity along a straight track. It travels 90 cm in 20 s. The velocity of the toy car is ___ m/s along the track.
3. A car accelerates steadily from rest to 20 m/s in a time 8.0 s. The acceleration of the car is ___ m/s^2.
4. A student measures the acceleration of a trolley along a slope for different values of the force pulling the trolley. Which of these is the independent variable in this experiment?
5. A trolley travels down a slope. It is stationary at the start and gets faster as it moves. A student takes measurements and calculates: (distance travelled) ÷ (time taken). What has the student found?
6. A trolley is stationary at position A and then accelerates along the track. A student wants to measure the trolley’s average acceleration between A and C. Which of these calculations should be used?
7. A ___ is an instrument that uses an infrared beam to turn a timer on and off as an object passes through.
8. A trolley takes 3.50 s to travel along a ramp. Its starting velocity is 0 and its final velocity is 0.42 m/s. The acceleration of the trolley is ___ m/s^2.
9. A student wants to find the relationship between force and acceleration of a trolley. He will use masses on a hanger to pull the trolley. To make the test fair, how should he increase the force?
10. The picture shows a trolley with three 100 g masses resting on it, and two 100 g masses attached to the trolley by a string. If friction can be ignored, what is the accelerating force on the trolley?
11. A student wants to find the relationship between force and acceleration of a trolley on a track. Before taking measurements, she tilts the track at an angle. The reason for this is to make sure that …
12. If two variables, x and y, are directly proportional, which of these statements are correct?

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