A quarterback throws a football with a mass of 0.4 kilograms at a rate of 16.5 m/s². How much force does the player apply? (Use the equation F = m x a)

• 0.4 kg

• 6.6 N

• 41.25 N

• 16.5 m/s²

Tags

NGSS.MS-PS2-2

Select the line that illustrates an object changing direction and returning to start.

• line A

• line B

• line C

• line D

As the fuel in the rocket ignites, the force of the gas expansion and explosion pushes out the bottom of the rocket and pushes the rocket upwards.

• Newton's First Law

• Newton's Second Law

• Newton's Third Law

Tags

NGSS.MS-PS2-1

At the Kennedy Space Center, a rocket stands poised for liftoff. As the countdown hits zero, the engines ignite with a thunderous roar, propelling the rocket into motion. Inside, the astronauts feel an immense force pressing them back into their seats as the vehicle ascends. The rocket’s initial velocity is 0 m/s. After 20 seconds, its final velocity is 500 m/s. 

Calculate the rocket’s acceleration.

• a = 15 m/s²

• a = 20 m/s²

• a = 25 m/s²

• a = -25 m/s²

Tags

NGSS.HS-PS2-1

To escape Earth's gravitational pull and journey into space, the rocket must attain escape velocity. The rocket is successful - it took 60 seconds to travel 270,000 meters upward.

Calculate the rocket’s velocity.

• v = 16,200,000 m/s upward

• v = 16,200,000 m/s

• v = 4,500 m/s

• v = 4,500 m/s upward

Tags

NGSS.HS-PS2-1

Newton's ​ (a)   Law states that for every action, there is an equal and ​ (b)   reaction.

• 3rd
• 1st
• 2nd
• opposite
• parallel

Tags

NGSS.MS-PS2-1

Match Newton's Laws to their description.

• F = m × a

• Newton's 2nd Law

• For every action, there is an equal and opposite reaction.

• Newton's 3rd Law

• An object at rest stays at rest unless acted upon by a net force.

• Newton's 1st Law

Tags

NGSS.MS-PS2-1

When you are standing up in a subway train, and the train suddenly stops, your body continues to go forward.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

A pitched baseball goes faster than the one that is gently thrown.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

Tags

NGSS.MS-PS2-1

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Runner B ran 60 meters in 30 seconds

Calculate the Speed of Runner B.

• 0.5 m/s

• 2 m/s

• 1,800 m/s

Tags

NGSS.MS-PS3-1