Tesr - Force Flashcards
1
Q
- An object in motion with no unbalanced forces acting on it will.
A
Continue to move in its path at a constant speed
U7 C1 force pg-1
2
Q
- The relationship among mass, force, amd acceleration is explained by
A
Newton’s second law
U7 C1 force pg-1
3
Q
- The size of gravitational force between two objects depends on their
A
Masses and the distance between them
U7 C1 force pg-1
4
Q
- An astronaut is planning a trip to a newly discovered planet. According to the law of universal gravitation, the astronauts weight on the new planet will be greater than his weight on earth if:
A
The new planet has more gravity than earth
U7 C1 force pg-1
5
Q
- When two forces on the same object are equal and opposite, these forces are called
A
Balanced forces
U7 C1 force pg-2
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 watermelon’s motion if false?
A
The watermelon falls with a constant velocity
U7 C1 force pg-2
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
800 N up
U7 C1 force pg-2
8
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
U7 C1 force pg-2
9
Q
- An object that is falling freely has a constant what?
A
Acceleration
U7 C1 force pg-3
10
Q
- Tendency of an object to resist changes in motion
A
Inertia
U7 C1 force pg-3
11
Q
- The attraction any two objects have on one another
A
Gravity
U7 C1 force pg-3
12
Q
- Related to the amount of force needed to change an object’s motion
A
Momentum
U7 C1 force pg-3
