Force equals mass times acceleration

What is the force on a 1000 kg elevator that is falling freely at 9.8 m/sec²

• 102.04 n

• 9,800 n

• 980 n

• 103 n

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the acceleration of a 50 kg object pushed with a force of 500 newtons?

• 100 m/s²
• 25,000 m/s²
• 10 m/s²
• 25 m/s²

Tags

NGSS.MS-PS2-2

Newtons 1st law of motion states:

• An object in motion will stay in motion and an object in rest will stay in rest unless acted upon by and unbalance force.
• For every action there is an equal and opposite reaction. 
• Acceleration is produced when a force. acts on a mass. 
• The greater the mass  the greater the amount of force needed to change its motion. 

The law of inertia is also known as which law of motion?

• Newtons first law of motion. 
• Newtons second law of motion. 
• Newtons third law of motion. 
• Inertia has nothing to do with the laws of motion. 

A 50 kg skater pushed by a friend accelerates 5 m/sec².  How much force did the friend apply?

• 45 N
• 15 N 
• 10 N
• 250 N

Tags

NGSS.MS-PS2-2

A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec².  What is the mass of the object?

• 100kg 
• 1,250kg
• 50kg
• 5kg

Tags

NGSS.MS-PS2-2

This triangle is used to determine speed. 

• True
• False

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NGSS.MS-PS3-1

Which example below demonstrates Newton's third law of motion the best? 

• When a boxer lands a powerful hit on his or her opponent the opponent loses composure or can even get knocked down.
• It takes more force for a boxer to knock out a larger opponent vs a smaller opponent. 
• Sometimes when a boxer is warming up by running but they can be slowed down if there is traffic in the road. 
• There are only two laws of motion. 

Tags

NGSS.MS-PS2-1

The classes are playing tug of war. Barsoum’s room pulls to the left with a force of 45 N. Coach Camacho's room pulls to the right with a force of 50 N. What is the net force? And who won?

• 5N right. Coach Comacho's Class won.
• 5N Left. Barson's class won. 
• 95N and Coach Comacho's class won. 
• 95N and Barson's class won.

Tags

NGSS.MS-PS2-2

Which is an unbalance force?

• A book sitting on a desk.
• A ball moving in a constant speed in the same direction. 
• While doing a mannequin challenge Jose suddenly falls over when a bug lands on his nose. 
• Every student in class is sitting perfectly still at their desks.

Tags

NGSS.MS-PS2-2