The picture below shows Jamal pushing with a 100-Newton (N) force on a large box. Neither Jamal nor the box move when he pushes on it.

Question

What force is the box applying on Jamal?

a
a 100 N force in the opposite direction that Jamal is pushing it
b
a 0 N force in the opposite direction that Jamal is pushing it

c
a 60 N force in the opposite direction that Jamal is pushing it
d
a 20 N force in the opposite direction that Jamal is pushing it
Question 30
Match the description of nuclear decay to the type of nuclear decay.

Column A
1.


: 4/2 He


2.


: 0/-1 e


3.


:0/0 Y


4.
Can be stopped by paper:
Can be stopped by paper
5.
Can be stopped by aluminum:
Can be stopped by aluminum
6.
Can be stopped by lead:
Can be stopped by lead

Question 31
What is the difference between a vector and a scalar?

a
A vector measurement is required for distance, a scalar measurement is required for displacement
b
A vector is only used in measuring forces, a scalar is only used in measuring mass
c
A vector is only measured in SI units, where scalars are only measured in US Customary units
d
A vector measurement contains a direction and magnitude, a scalar measurement only contains a magnitude

Answer 1

Question about Jamal and the Box

In the scenario where Jamal exerts a 100-Newton force on the box and neither he nor the box moves, we can analyze the forces acting on the box using Newton's Third Law, which states that for every action, there is an equal and opposite reaction.

Since Jamal is pushing the box with a force of 100 N, the box exerts an equal and opposite force on Jamal. Therefore, the answer is:

a: a 100 N force in the opposite direction that Jamal is pushing it

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Question about Nuclear Decay

For the matching of nuclear decay types, here are the appropriate matches:

1. Alpha decay: 4/2 He (Helium nucleus)
2. Beta decay: 0/-1 e (electron)
3. Gamma decay: 0/0 γ (gamma radiation)
4. Alpha particles can be stopped by paper.
5. Beta particles can be stopped by aluminum.
6. Gamma rays can be stopped by lead.

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Question about Vector and Scalar

The distinction between vector and scalar can be defined as follows:

A vector includes both a magnitude and a direction, whereas a scalar includes only a magnitude.

Therefore, the correct answer is:

d: A vector measurement contains a direction and magnitude, a scalar measurement only contains a magnitude.