Test - Force Flashcards
1
Q
- A firefighter feels the hose pushing backwards onto him as he uses it to put outa fire. What is most likely cause of this?
A
The escaping water exerts an equal and opposite force on the hose
2
Q
- The relationship among mass, force, and acceleration is explained by ___.
A
Newton’s 2nd law of motion
3
Q
- A baseball player swings his bat and misses the ball but hits a fly that was hovering over home plate. The acceleration of the fly compared to what the acceleration of the ball would have been with the same forces applied to it would be
A
Larger
4
Q
- Which statement below is false
A
Weight is a constant no matter where you are located
5
Q
- What is the weight of the box in the picture?
A
245 N
6
Q
- Consider a watermelon that starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. Which statement about the watermelons motion is false?
A
The Watermelon falls with a constant velocity.
7
Q
- A man weighing 800N is standing on a chair. In order to support the man, what force is the chair exerting?
A
800 N up
8
Q
- What is the Net force on the block to the right?
A
2N left
9
Q
- In the picture, if the card were quickly pulled off the cup like the arrow suggests, what property would explain why the coin falls into the cup rather than moving with the card?
A
Inertia
10
Q
- Gravity
A
The attraction any two objects have on one another
11
Q
- Momentum
A
Related to the amount of force needed to change an objects motion
