Speed, Force, Net Force

Jorge stays after class to work on is science homework and is late for hockey practice. He decides to run so the coach won't be mad. If the locker room is 300 m from the classroom and Jorge can run a surprising 25 m/s, how long would it take him to get there? 

• 10 s
• 14 m
• 12s
• 12 m/s

While waiting for his Mom to come out of the hairdresser's, Kevin accidentally puts the car in gear and it begins to roll forward. How far would the vehicle travel if it moved at 36 m/s for 2 s? 

•  18 meters
• 72 meters
• 16 m/s
• 72 s

Lizbeth sees a guy at the dance that she has a crush on and decides to chase him and ask him out on a date.. Find her speed if she runs 80 m in 5 s.  

• 400m/s
• 16m/s
• 15m/s
• 16 m

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

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

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. 

What is Newton's Third Law?

• Object in motion stays in motion and an object at rest stays at rest unless acted on by a outside force
• Force = mass x acceleration
• For every action there is an equal and opposite reaction

Tags

NGSS.MS-PS2-1

According to Newton's second law, if you increase the force applied to an object :

• it accelerates more
• it doesn't move
• you get more inertia
• it decelerates

If there are two forces going in the same direction how would you find the net force?

• Subtract
• Add
• Neither
• Multiply

Tags

NGSS.MS-PS2-2