OpenSciEd Contact Forces (Unit Assessment Prep)

Which of the following statements best describes what happens to objects during a collision?

• Objects always return to their original shape after a collision.

• Objects may change shape and motion during a collision.

• Objects do not experience any force during a collision.

• Objects only change motion, not shape, during a collision.

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

What happens to an object when it reaches its elastic limit during a collision?

• It returns to its original shape.

• It deforms permanently.

• It breaks immediately.

• It does not change shape.

Which factor does NOT affect the elastic limit and breaking point of an object?

• Thickness

• Shape

• Color

• Material

In a collision, how do the forces that objects exert on each other compare?

• They are equal in strength and opposite in direction.

• They are unequal in strength and in the same direction.

• They are equal in strength and in the same direction.

• They are unequal in strength and opposite in direction.

Tags

NGSS.HS-PS2-3

What does a free body diagram represent?

• The speed of an object.

• The forces acting on an object.

• The color of an object.

• The temperature of an object.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

How does increasing the speed of an object affect its kinetic energy (KE) and peak force during a collision?

• It decreases both KE and peak force.

• It increases both KE and peak force.

• It only increases KE, not peak force.

• It only increases peak force, not KE.

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

If the mass of an object is doubled, how does its kinetic energy change?

• It remains the same.

• It doubles.

• It triples.

• It quadruples.

Which of the following has a greater effect on the kinetic energy of an object?

• Increasing the mass

• Increasing the speed

• Decreasing the mass

• Decreasing the speed

Tags

NGSS.MS-PS3-1

What is the peak force in a collision?

• The average force during the collision.

• The minimum force during the collision.

• The maximum force during the collision.

• The force at the start of the collision.

Tags

NGSS.HS-PS2-1

If an object's speed is tripled, by what factor does its kinetic energy increase?

• 3 times

• 6 times

• 9 times

• 12 times