Force and Motion Ch 2

Which chair(s) experienced the strongest force when it was pushed? How do you know?  All 3 chairs have the same mass.

• The blue chair experienced the strongest force because it had the fastest ending speed.

• The black chair experienced the strongest force because it takes a stronger force to slow something down than it takes to speed something up.

• All three chairs experienced the same strength force because they changed speed by the same amount.

• The pink and blue chairs experienced the strongest forces because they both sped up.

Answer explanation

REMEMBER! The SAME force exerted on objects with the SAME mass would have the SAME change in velocity

Which boat(s) experienced the strongest force when hit? How do you know?

• The gray and pink boats experienced the strongest force because they are both more massive than the orange boat, and they all changed speed by the same amount.

• The pink boat experienced the strongest force because it has the highest ending speed.

• All three boats experienced the same force because they changed speed by the same amount.

• The gray boat experienced the strongest force because it takes more force to slow an object than it takes to make it go faster.

Answer explanation

REMEMBER: It takes MORE force to change the velocity of a MORE massive object!

In which crash did the puck experience a stronger force? Why?

• The puck did not experience a force; only the paddles experienced a force in the crashes.

• Crash 2; the force on the purple paddle was stronger in this crash because it has a larger mass, so the force on the puck was also stronger.

• The puck experienced the same force in both crashes. The paddles changed speed by the same amount in each crash, so the force on the puck was the same each time.

Answer explanation

REMEMBER: It takes MORE force to move a MORE massive object!

Which soccer ball(s) experienced the strongest force when it was kicked? How do you know? (All three soccer balls  have the same mass)

• The purple soccer ball because it has the fastest ending speed.

• The blue soccer ball because it takes a stronger force to slow something down than to speed something up.

• The blue soccer ball because it changed speed the most.

Answer explanation

REMEMBER: GREATER force causes a GREATER change in velocity!

Which skier(s) experienced the strongest force when bumped? How do you know?

• All three skiers experienced the same force because they changed speed by the same amount.

• The purple skier; he is more massive and has the fastest ending speed.

• The yellow and purple skiers; they have more mass than the red skier, but changed speed by the same amount.

Answer explanation

REMEMBEr: It takes MORE force to move a MORE massive object!

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In which crash did the green test car experience a stronger force? How do you know?

• Crash 1; the force on the garbage truck was stronger in this crash because it has more mass, so the force on the green test car was also stronger.

• There is no force on the green car. In each crash, only the truck experienced a force.

• It was the same from both crashes. The trucks changed speed by the same amount in both crashes, so the force on the test car was the same both times.

Answer explanation

REMEMBER: It takes MORE force to move a MORE massive object!

Which hockey puck(s) experienced the strongest force when hit? How do you know? (All of the pucks have the same mass)

• The black puck because it takes a stronger force to slow something down than to speed it up.

• All three hockey pucks experienced the same strength force because they changed speed by the same amount.

• The green puck, experienced the strongest force because it has the fastest ending speed.

Answer explanation

REMEMBER: The SAME force exerted on the SAME mass will have the SAME change in velocity!

Which golf ball(s) experienced the strongest force? How do you know?

• The blue golf ball; it has more mass and the fastest ending speed.

• All three golf balls experienced the same force because they changed speed by the same amount.

• The blue and white golf balls; they have more mass than the yellow golf ball, but changed speed by the same amount.

• The white golf ball; it takes a stronger force to slow down a more massive object than to speed it up.

Answer explanation

REMEMBER: IT takes MORE mass to move a MORE massive object!

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

In which crash did the rubber duck experience a stronger force? How do you know?

• There is no force on the rubber duck. Only the toy boats experienced a force in those crashes.

• The force was the same in both crashes. The toy boats changed speed by the same amount so that means the force on the rubber duck was the same in both crashes.

• Crash 2; the force on the orange boat is stronger because it has more mass, so the force on the rubber duck is also stronger.

Answer explanation

REMEMBER: It takes MORE force to move a MORE massive object!

Which skateboard(s) experienced the strongest force when bumped? How do you know? (All skateboards are the same mass)

• The green skateboard experienced the strongest force because it changed speed the most.

• The red and brown skateboards experienced the same strength force because they both gained forced, but the green skateboard lost force.

• The red skateboard experienced the strongest force because it has the fastest ending speed.

Answer explanation

REMEMBER: A GREATER force will cause a GREATER change in velocity!