Physics Chapter 2 (2.8)

What is the definition of weight?

• The product of force and time.

• The amount of matter in the object.

• The force of gravity acting on the object.

• Tendency of an object to remain at rest or if moving to continue its motion.

What is the formula for weight?

• ma

• mg

• mv

• mu

What is S.I. Unit for weight?

• kg

• N s

• N kg^-1

• N

The weight, W, of an object ______ ________ which has the same direction with gravitational force, that is towards the centre of the Earth

Define gravitational strength, g.

• the force acting per unit mass caused by gravitational pull

• product of mass and gravitational acceleration

• gravitational force acting on the object

• Every action force, there is reaction force at the same magnitude but in opposite direction

State the unit for gravitational strength, g.

• kg

• N s

• N kg^-1

• N

Gravitational field strength, g is same as _____________ ____________.

What is the formula for gravitational strenght?

• W/g

• W/m

• mg

• ma

The gravitational field strength for objects on the surface of the Earth is ____ N kg^-1.

Draw an astronaut.