Balanced and Unbalanced Forces Newton Laws

Looking at the image. Decide if this is balanced or unbalanced.

• Unbalanced

• Balanced

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Looking at the image. Decide if this is balanced or unbalanced.

• Unbalanced

• Balanced

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The diagram below shows unequal opposing forces.

Which way will the wagon move?

• The cart will move to the right.

• The wagon will move to the left.

• The wagon will remain stationary.

• The wagon will move left and then right and then stop.

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What is Newton's 2nd Law?

• For every action there is an equal and opposite reaction.

• Acceleration depends on two variables, the mass of the object and the amount of force.

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What is Newton's 3rd Law?

• For every action there is an equal and opposite reaction.

• Acceleration depends on two variables, the mass of the object and the amount of force.

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What explains why objects resist changes in their state of motion?

• gravity

• inertia

• force

• friction

The girl on the sled will remain in motion unless

• her motion is changed by magnetic forces.

• she is stopped by an outside force.

• she accelerates at a constant speed.

• the force of friction forcer her to move faster.

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This is describing the law of

• forces

• inertia

• velocity

• gravity

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Water comes through the hose and is sprayed by the sprinkler.

Which principle best explains why the sprinkler spins?

• Energy is released when water condenses.

• Most substances expand when heated and contract when cooled.

• Every action has an equal and opposite reaction.

• Solid substances are usually more dense than liquid.

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The picture shows a weightlifter holding the barbell over his head.

The force of gravity pulling down on the barbell is 756 newtons.

How many newtons of force are exerted by the weightlifter to hold the barbell up?

• No Newtons

• 756 Newtons

• 368 Newtons

• 14767 Newtons

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