test 1 class 9 A and B

Newton's second law states that F = m x a (Force is mass times acceleration). Which example would have the GREATEST acceleration?

• a 10 kg ball thrown with a 50 Newton force

• a 1 kg ball thrown with a 0.5 Newton force

• a 50 kg student launched by a 100 Newton catapult

• a 500 kg car accelerated by 1000 Newtons from the engine

Tags

NGSS.MS-PS2-2

The rate of change of an object's velocity is called _______.

• energy

• speed

• force

• acceleration

What is the unit measure of Force? 

• Meters/second² (m/s²)
• Joules (J)
• Meters (m)
• Newtons (N)

Which of Newton's laws is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them?

• first
• second
• third 
• fourth

Tags

NGSS.MS-PS2-1

Force and acceleration are _______________ proportional

• Inversely
• Directly
• Not
• Almost

Tags

NGSS.HS-PS2-1

You are moving a dresser that has a mass of 36kg. Its acceleration is 0.5 m/s². What is the force being applied?

• 72 N

• 35.5 N

• 1.8 N

• 18 N

Tags

NGSS.MS-PS2-2

the law of interia applies to

• a. Objects at rest

• b. Moving objects

• c. Both moving A and B

This motion graph represents:

• constant speed
• acceleration
• body at rest
• slowing down

Tags

NGSS.MS-PS3-1

A stopped car begins moving and reaches a speed of 25m/s in 5 seconds. What is its acceleration?

• +25m/s²

• -0m/s²

• +5m/s²

• 5m/s

If you travel 7.5 km and walk for 1.5 h, what is your average speed?

• 5 km/h
• 11.25 km/h
• 0.2 km/h