Forces and Pressure

Question 1

What is the SI unit of force?

Answer 1

Newton

Question 2

What is the definition and formula of weight?

Answer 2

Weight is the amount of gravitational force exerted on an object. Formula of weight is mass times gravitational field strength.

Question 3

What are the conditions for a phenomenon to be called work?

Answer 3

1. The object must be moving in the direction of the force applied.
2. Energy must be converted from one form to another.

Question 4

What is the formula for work?

Answer 4

work done (joules)= force applied (Newton) times distance moved(metres)

Question 5

How does a object move?

Answer 5

When something exerts a force upon an object, the object gains kinetic energy. Until the object loses all its KE due to friction, the object will never stop moving.

Question 6

What is the formula for force?

Answer 6

Mass(kg) times ( metres / seconds2)

Question 7

What is the unit of power and formula?

Answer 7

1 watt = 1 joule / 1 second
1 kWh = 1000 watts

Question 8

What is the formula of gravitational potential energy?

Answer 8

GPE = mass (kg) times gravitational field strength x distance (m)

Question 9

Is nuclear energy a renewable source of energy?

Answer 9

No

Question 10

What is the law of conservation of energy?

Answer 10

Energy can only be converted from one form to another, and cannot be created or destroyed.