Laws of Force and Motion FTF

The masses of four vehicles and the net forces acting on them as they enter a highway are recorded in the table below. Which vehicle has the greatest acceleration as it enters the highway?

• Sedan
• Coupe
• SUV
• Truck

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NGSS.MS-PS2-2

According to Newton’s Law of Inertia, which of the following objects will change its motion?

• A bike rider on a smooth and level road, pedaling at a constant rate.
• A train pulling on another train, each with the same amount of force.
• A chair sitting on the floor with balanced forces acting in opposite directions.
• A ball rolling across the floor with friction acting in the opposite direction.

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NGSS.MS-PS2-2

Safety belts protect people in cars in the event of an accident because, according to Newton’s Laws of Motion, when an impact causes the car to suddenly change its motion, -

• the people in the car will continue to move in the same direction and at the same speed as before the impact.
• the speed of the car always increases, giving it greater force since the mass will remain the same.
• the speed of the people always increases, since now they have, not one, but two forces acting on them.
• the car now has a greater overall mass - its own mass plus the mass of the object by which it has been struck.

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NGSS.MS-PS2-2

The masses of four objects are given in this table. If all of the objects have the same acceleration, which will require the greatest force?

• Object 1
• Object 2
• Object 3
• Object 4

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NGSS.MS-PS2-2

Two cars with different masses travel at the same speed down a hill toward a stop sign. What will happen when both cars apply brakes at the same time to stop?

• The car with the smaller mass will require less forces to stop than the car with the larger mass.
• The car with the larger mass will amintain its velocity while traveling down the hill.
• The car with the smaller mass will take longer to stop than the car with the larger mass.
• The car with the larger mass will have less inertia than the car with the smaller mass.

Tags

NGSS.MS-PS2-2