PHY2048 - GENERAL PHYSICS I
REVISION QUESTIONS FOR CHAPTER 4

Below you will find a set of 5 conceptual and numerical revision questions selected randomly from lots of questions I have put together covering the material in Chapter 4, "Newton's Laws". There are questions on Newton's 1st, 2nd and 3rd Laws and the use of free-body diagrams. When you have finished the quiz, click on the "Submit Quiz" button at the bottom and within seconds it will be automatically graded and the results returned to you!

To select a new set of questions click on the "Reload" or "Refresh" button on your browser. You may find some of the questions duplicated but that's the nature of a random selection. Try it a few times ... it's not fattening and you may learn something!

Many thanks to Mark Wood for producing the quiz-maker code.


Q1: Which of the following statements includes all the essential elements of Newton's first law?

A body at rest persists in its state of rest unless acted on by a non-zero net external force.
A body persists in its state of rest or of uniform motion in a straight line as long as the net external force remains constant.
For every action there is an equal and opposite reaction.
A body persists in its state of rest or of uniform motion in a straight line unless acted on by a non-zero net external force.
The acceleration of a body is proportional to the net external force acting on it and to the mass of the body.

Q2: Joe pushes Bill, who is fast asleep. Bill ...

will inevitably push Joe when he wakes.
pushes Joe, but not as hard.
does not push Joe.
pushes Joe equally hard.

Q3: A vertical rope is attached to an object that has a mass of 40.0 kg and is at rest. The tension in the rope needed to give the object an upward speed of 3.50 m/s in 0.700 s is

592 N
392 N
200 N
980 N
729 N

Q4: You want to elope by sliding down a nylon rope made by tying stockings together. The rope will withstand a maximum tension of 300 N without breaking. Your mass is 61.2 kg. The magnitude of the smallest acceleration with which you can slide down the rope is

9.81 m/s2
4.91 m/s2
zero
2.40 m/s2
19.6 m/s2

Q5: Two tug-of-war teams are pulling on the ends of a rope, each team with a force of 1000 N. If the rope does not move, the tension in the rope is

2000 N
500 N
1000 N
zero
2000 kg

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