Question

B.
3
1. Why do we need force?
2. What does the law of conservation of energy state?
3. Name the different types of forces.
Tick (/) the correct option:
A catapult works by using:
gravitational force
b.
elastic force
buoyant force
d. frictional force
2. A screwdriver is an example of a :
pulley
b. lever
C wheel-and-axle arrangement d. second-class lever
3. A screwjack used to lift car is a:
first-class lever
b. second-class lever
С. pulley
d. screw
4. The upward push of water on a floating object is called :
buoyant force
b. volume​

Answer 1

Answer:

A force can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity