LS Practice exercise in PHYSICS W2 by Joenard Sibonga

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Four students—(A) abigail, (B) benny, (C) candy, and (D) danny begin running from the same starting line at the same time. The position vs. time graph below shows their motion over 20 seconds. Identify which student accelerated.

• Abigail

• Benny

• Candy

• Danny

The first bicycles were engineered in Europe in the 1800s. It's estimated that there are now more than one billion bicycles in the world!

Select all options that accurately complete the statement.

A bicycle that is ______ is accelerating.

Choose all answers that apply:

• slowing down

• changing direction

• moving with constant velocity

• speeding up

• remain at rest

Consider the following experiments:

In experiment 1, a student places a ball on a tee and hits the ball with the bat as hard as they can. In a second test, the same student hits the ball half as hard. Both times, the student measures how far the ball travels.

In experiment 2, a student places 3 books on a rolling chair and gives the chair a push. They then place 10 books on the chair, and the student gives the chair a push with the same force. Both times, the student measures how far the chair rolls.

Which experiment is the better test of how force affects an object’s motion?

Choose 1 answer:

• Experiment 1, because the ball is hit with different forces

• Experiment 1, because the student uses the same bat both times

• Experiment 2, because the mass on the rolling chair is different each time

• Experiment 2, because the force is applied onto the chair each time

• F₁ = 18 N

  F₂ = 52 N

• F₁ = 43 N

  F₂ = 34 N

• F₁ = 43 N

  F₂ = 18 N

• F₁ = 52 N

  F₂ = 43 N

• 548,000 N

• 575,000 N

• 623,000 N

• 685,000 N