Test - Forces Flashcards
1
Q
- What is an example of a false statement about mass, weight, and matter?
A
Weight is a constant no matter where you are located.
NB pg. 23
2
Q
- If the same force is applied to four balls, which one will have the least acceleration?
a) M=.5kg b) M=7.3kg c) M=10kg
d) M=.75kg
A
B) 7.3kg
NB pg. 11
3
Q
- A kid drops a feather and rock at the same time from their window. If air resistance wasn’t a factor, what should she observe?
A
The rock and feather fall at the same rate
NB pg. 22
4
Q
- Consider a watermelon that starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. What would be a false statement?
A
The watermelon falls with a constant velocity
NB pg. 3
5
Q
- A baseball player swings his bat and misses the ball but hits a fly that was hovering over the home plate. The acceleration of the fly compared to what the acceleration of the ball would have been with the same force applied to it would be…
A
Larger
NB pg. 11
6
Q
- The relationship among mass, force, and acceleration is explained by ________
A
2nd law of motion
NB pg. 22
7
Q
- What property would explain when you pull a card out from under a penny and the penny falls into the cup it’s on top of?
A
Inertia
NB pg. 20
8
Q
- When two forces on the same object are equal and opposite, these forces are called ____ forces
A
Balanced
NB pg. 20
9
Q
- Tendency of an object to resist changes of motion.
A
Inertia
NB pg. 20
10
Q
- The highest velocity a falling object will reach.
A
Terminal velocity
NB pg. 22
11
Q
- The attraction any two objects have on one another.
A
Gravity
NB pg. 22
12
Q
- Push or pull one body exerts on another
A
Force
NB pg. 20
13
Q
- Related to the amount of force needed to change an objects motion
A
Momentum
NB pg. 23
14
Q
- B) what speed will the skydiver eventually reach? What is this speed called? C) Why does this occur?
A
B) 55m/s; terminal velocity C) gravity pushes down and air resistance pushes up. This becomes balanced
NB pg. 22
15
Q
- Note card
A
Note card
