Force and Motion

When a hammer strikes a nail, the nail

• exerts balanced forces that helps it from moving

• exerts a force equal to the weight of the hammer

• exerts an unbalanced force that changes its velocity

• exerts an equal and opposite force back on the hammer

Tags

NGSS.MS-PS2-1

A bird dropped a seed from the sky to the ground. Which of these will change as the seed falls from the sky to the ground?

• the mass of the acorn

• the force on the acorn

• the density of the acorn

• the velocity of the acorn

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the net force of the car?

• 3 N to the right

• 3 N to the left

• 17 N to the left

• 17 N to the right

Tags

NGSS.MS-PS2-2

A spaceship moves into Earth's atmosphere at a speed of 40 km/s. It is slowed by friction with Earth's atmosphere by 0.03 km/s before it reaches Earth's surface. What is the final speed of the spaceship?

• 0.7 km/s

• 39.97 km/s

• 40.03 km/s

• 20 km/s

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-5

Which note shows the bicycle is in motion?

• Note 1, 2, 3

• Note 1, 2, 5

• Note 3, 4, 5

• Note 4 and 5

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Which segment shows the toy car at a constant speed that is greater than zero?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-1

Which segment shows the toy car returning to its original position?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-1

A diver jumps off of a diving board with the force of 40 N. The diving board has twice the mass of the diver. Thomas believes that the diving board exerts a force of 80 N back onto the diver, allowing him to fly into the air. Regina, however, believes that the diving board will exert a force of 40 N back onto the diver. Which student is correct?

• Regina because of Newton's first law.

• Regina because they are equal and opposite forces.

• Thomas because they are equal and opposite forces

• Thomas because you must double the force if the mass is doubled

Tags

NGSS.MS-PS2-1

Which scenario represents Newton's 3rd Law?

• a rocket takes off from the ground

• a book slides forward on a seat when the car stops

• a heavier ball falls at the same speed as a lighter ball

• a vehicle rounds a curve and changes its acceleration

Tags

NGSS.MS-PS2-1

Which scenario represents Newton's 1st Law?

• a rocket takes off from the ground

• a book slides forward on a seat when the car stops

• a heavier ball falls at the same speed as a lighter ball

• a vehicle rounds a curve and changes its acceleration