Test - Unit 6 Force Flashcards
1
Q
- The relationship among mass, force, and acceleration is explained by ____.
A
Newton’s 2nd Law of Motion
U6 C3 pg 3
2
Q
- An astronaut is planning a trip to a newly-discovered planet. According to the Law of Universal Gravitation, the astronaut’s weight on the new planet will be greater than his weight on Earth if:
A
the new planet has more gravity than Earth
U6 C3 pg 3
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 force applied to it would be
A
larger
U6 C2 pg 1
4
Q
- Weight is a constant no matter where you are located. True or False
A
False
U6 C3 pg 4
5
Q
- Compared to the inertia of a 2.0 kg ball, the inertia of a 4.0 kg ball is
A
twice as great
U6 C3 pg 1
6
Q
- Consider a watermelon that’s starts from rest and is dropped straight down from a tall building. Air resistance can be ignored. Which statement about the watermelon’s motion is FALSE?
A
The watermelon falls with a constant velocity
U6 C3 pg 3
7
Q
- A man weighing 800 N is standing on a chair. In order to support the man, what force is the chair exerting?
A
800N up
U6 C3 pg 1
8
Q
- If the block in the picture above has an acceleration of 1m/s2, what would be the block’s mass?
A
2kg
U6 C3 pg 1
9
Q
- Which of the following best describes how a swimmer moves through the water?
A
The swimmer pushes backwards on the water and the water pushes with an equal but opposite force back on the swimmer
U6 C3 pg 4
10
Q
- The attraction any two objects have on one another
A
Gravity
U6 C3 pg 3
11
Q
- Related to the amount of force needed to change an object’s motion.
A
Momentum
U6 C3 pg 4
12
Q
- Why does someone not wearing a seatbelt in a car fly forward when the car stops suddenly? Make sure to include whichlawexplainsthis.
A
Newton’s 1st Law b/c objects in motion resist a change in motion, due to inertia
U6 C3 pg 1
