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Question 32

According to Newton's Third Law, if a sledgehammer hits a wall with a force of 1000 N, how much force does the wall hit the sledgehammer?

a
0 N
b
500 N
c
1000 N
d
- 1000 N
Question 33
Which of the following would be a situation with unbalanced forces?

a
Two people pulling on the same side of a wheelbarrow
b
A team of players in tug of war pulling on the rope, each team with equal numbers of people pulling with equal strength
c
Two people of opposite sides of a big tire. One pushes the tire and one pulls it with equal force
d
Two people not touching a crate that is sitting stationary
Question 34
Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary

a
The force of gravity on the object is different if it is stationary or not.
b
The force of friction on the object is different if it is stationary or not
c
The force of the push on the object is different if it is stationary or not
d
The normal force on the object is different if it is stationary or not

1 answer

Question 32
According to Newton's Third Law, if a sledgehammer hits a wall with a force of 1000 N, how much force does the wall hit the sledgehammer?
Answer: c - 1000 N
Explanation: According to Newton's Third Law, for every action, there is an equal and opposite reaction. Therefore, the wall exerts a force of 1000 N back on the sledgehammer.

Question 33
Which of the following would be a situation with unbalanced forces?
Answer: a - Two people pulling on the same side of a wheelbarrow
Explanation: This situation creates an unbalanced force because both individuals are applying force in the same direction, which would cause the wheelbarrow to move.

Question 34
Why is it generally easier to push a heavy object that is already moving instead of the same heavy object that is stationary?
Answer: b - The force of friction on the object is different if it is stationary or not
Explanation: When an object is stationary, it generally experiences static friction, which is typically greater than kinetic friction (the friction acting on a moving object). Hence, it takes more force to start the movement than to maintain it.