(10/18/23) CH.4.S.1. Work and Machine

1._______ is force applied through a distance.

• Effort

• Resistance

• Power

• Work

2.In which of the following situations do your arms do work on books?

1. 
   

• 1. holding a heavy stack of books while standing

  
  

• 1. carrying a heavy stack of books

  
  

• 1. dropping a stack of books onto a table

• 1. picking up a pile of books from the floor

  
  

3.Which of the following equations should be used to calculate work done?

• W = F × d

• 1. W = F/d

• 1. W = F × a

• 1. W = m × d

4.You apply a force of 18 N to a dresser and move it 3.0 m. How much work did you do on the dresser?

• 54 J

• 6.0 J

• 21 J

• 27 J

5.A watt is equal to _______.

• one newton-meter

• 1. one meter per second

• 1. one newton per second

• 1. one joule per second

6.If you apply a force of 10 N to a box and push it 10 m in 10 s, how much power did you deliver?

• 30 W

• 1,000 W

• 10 W

• 100 W

7.How does a ramp make it easier to move a heavy object a certain distance?

• 1. by decreasing the amount of force required to move the object

• 1. by decreasing the amount of work required to move the object

  2. 
     

• 1. by decreasing the distance the object moves

• 1. by increasing the amount of force required to move the object

8.A _______ is a device that does work with only one movement

1. 
   

• 1. compound machine

  
  

• 1. hand-operated machine

• 1. force multiplier

• 1. simple machine