Daily Spark Unit 3 Review 2 20-21

 Work done = Force x _________

• a. distance
• b. acceleration
• c. velocity
• d. speed

A man pushes a car with a force of 20N. He pushes it 5m. How much work is done?

• 4J

• 100J

• 50J

• 150J

When Izzy and Zoe pull on the rope with the same amount of force, the forces are _____.

• increased

• unbalanced

• balanced

• decreased

Tags

NGSS.MS-PS2-1

Why did Izzy fall when playing tug of war?

• he tripped

• unbalanced forces

• balanced forces

• he was pushed

Tags

NGSS.3-PS2-1

The unit of power is the...

• work
• watt

Work is done on an object when the object moves in the SAME direction in which the force is applied.

• True
• False

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 

• 77 J
• 7.7 J 
• 0.7 J 
• 770 J 

Tags

NGSS.HS-PS3-2

Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required?

• 100 watts

• 400 watts

• 104 watts

• 50 watts

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

Constants should be...

• different

• same

• kind of the same

• none of the above

This variable in an experiment is the one being deliberately changed by the scientist. 

• dependent variable
• independent variable
• data
• control group