Physical Science Final Review

The diagram below shows a stationary cart on a frictionless surface. Two unequal opposing forces are about to be applied to the cart.

• The cart will move to the left.
• The cart will move to the right.
• The cart will alternate between moving left and right.
• The cart will remain stationary.

Which statement  best summarizes the scientific concept shown in the cartoon?   

• A falling body accelerates at a constant speed. 
• The motion of an object is constantly changing due to magnetic forces. 
• The force of friction causes an object in motion to move faster.
• A body in motion will remain in motion unless influenced by an outside force.

Two examples of a pulley...

• knife & axe blade
• lightbulb & screw
• flagpole hoist & window blinds
• catapult & teeter totter

What is Newtons 3rd Law of motion?

• F=MxA
• Objects in motion will tend to stay in motion until acted upon by an outside force.
• For every action there is an opposite and equal reaction
• 3 strikes and your out

If you don't wear a seatbelt while in your car and you get into an accident, which of Newton's laws are you about to demonstrate?

• 1st, Objects in motion tend to stay in motion until acted upon by an outside force
• 2nd, F=MxA
• 3rd, For every action there is an opposite but equal reaction
• All of them

What is the Law of Conservation of Mass?

• It states that no matter can be created or destroyed.
• It states that no energy can be created or destroyed.
• It states that matter can be created or destroyed.
• It states that no sound can be created or destroyed.

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

__________ is stored energy. 

• Potential
• Kinetic
• None of the above 
• All of the above 

which point has the most potential energy

• G
• f
• b
• a

Which 2 letters have the most kinetic energy

• W & Y
• X & Z