Science chapter 8

what is force?

• pull and push upon an object

• point of application of an object

which force that applied in the action above?

• normal force

• elastic force

• gravitational force

Newton's Third Law states that every action, there is a reaction force of the

• different magnitude

• opposite direction

• same direction

• same magnitude

10 N = ?kg

what is the actual weight of the rubber duck if the buoyant force is 3N?

these are the parts of a lever except

• fulcrum

• effort

• bar

• load

which one is the first class lever?

• 
• 
• 
• 

based on the picture, which is the action force?

• weight

• normal force

how does the phenomenon above occur?

• the air molecule move freely cause it to expand and contract contract at the same time

• the wall of the balloon receive heat and cause it to expand.

• the air molecule move freely and collide with the walls of the balloon.

• the balloon loses heat and contract.

the ...... the temperature is , the slower the movement of air particle. Thus, the air pressure decrease.