Force and motion unit test

Answer 1

1. True or False: Force can cause an object to start moving, stop moving, or change its direction.
- True

2. Which of the following is an example of a force?
a) Gravity
b) Motion
c) Speed
d) Distance
- a) Gravity

3. What is the SI unit of force?
a) Meter
b) Kilogram
c) Newton
d) Joule
- c) Newton

4. The force required to maintain an object at a constant velocity is called:
a) Friction
b) Gravity
c) Inertia
d) Net force
- c) Inertia

5. What is the formula for calculating force?
a) Force = mass × velocity
b) Force = mass × acceleration
c) Force = weight × time
d) Force = distance ÷ time
- b) Force = mass × acceleration

6. Which type of friction occurs when an object moves through a liquid or gas?
a) Static friction
b) Rolling friction
c) Sliding friction
d) Fluid friction
- d) Fluid friction

7. True or False: Newton's first law of motion states that an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity, unless acted on by an external force.
- True

8. Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it, and inversely proportional to its:
a) Mass
b) Velocity
c) Distance
d) Time
- a) Mass

9. According to Newton's third law of motion, for every action, there is an equal and opposite:
a) Reaction
b) Force
c) Acceleration
d) Velocity
- a) Reaction

10. Which of the following is an example of projectile motion?
a) A car accelerating down a straight road
b) A person running on a treadmill
c) A ball being thrown into the air
d) A boat cruising on a calm lake
- c) A ball being thrown into the air