Newton's First and Second Law Review

What Unit do we measure Force in?

• Force (F)

• Meters per second squared (m/s²⁾

• Newtons (N)

• Kilograms (Kg)

If a ball of cheese is fired into frictionless space, the amount of force needed to keep it going equals

• twice the force with which it was fired
• the same amount of force with which it was fired
• 1/2 the force with which it was fired
• zero, since no force is requires to keep it moving. 

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Which has more Inertia? 

• Truck
• Ant
• A cat
• A skateboard

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Suppose that a sled is accelerating at a rate of 2 m/s². If the net force is tripled then what is the new acceleration of the sled?

• 12 m/s/s
• 6 m/s/s
• 12 in/s/s
• 120 m/s/s

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What law of motion does this picture represent?

• Newtons 1st law

• Newtons 2nd Law

• Newtons 3rd law

• Newtons 4th law

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Which of Newtons laws  best explains why football teams have big, large, fast athletes.

• Gravity
• second law
• first law
• Third law

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friction is a force that acts 

• in the same direction as the motion
• opposite to the direction of the motion
• opposite to the applied forces
• the same direction as the applied force

Forces that have a net force of zero (the object is still) are known as ___.

• Balanced forces

• Unbalanced forces

Are the forces in the picture Balanced or Unbalanced?

• Balanced

• Unbalanced

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Are forces balanced or unbalanced when a car is moving at a constant speed in a straight line?

• Balanced
• Unbalanced