33 Unit 4 Practice and Assessment

Outcome 1

1) Which has greater between a kilogram of feathers and a kilogram of pennies? Which has greater ? Which has greater ?

Outcome 2

2) What is the in of a 3 kg textbook?

3) Convert your own weight from pounds to Newtons. Then calculate your mass in kilograms. Show all work.

4) The (g) on the moon is 1/6 that on the surface of Earth. Based on your answers to the previous question, what would your weight be on the moon? What would your mass be on the moon?

Outcome 3

4) A 7 N pushes on an object to the right and a 7 N force pushes on the object to the left. What is the ? Can the object be in ?

5) A 5 N force pushes on an object to the right and a 7 N force pushes on the object to the left. What is the net force? Can the object be in static equilibrium?

6) You push on a large box with 120 N of force, but it doesn’t move. How large is the force? Draw a of the situation.

7)   Helping a 48 lb toddler learn to float in a swimming pool you notice that it feels as though they only weigh 5 lbs. How large is the on the toddler? Draw a free body diagram of the situation.

Outcome 4

8)   What weight of water must the toddler in the previous question be ?

9) An object has a of 0.5 m3. What is the maximum volume of water it can displace? What weight of water can it displace?

10) The object in the previous problem has a weight of 150 N. Will it float?

11) Is the object in the previous problem more or less dense than water?

Outcome 5

11) Calculate the density of the object referred to in the previous problem.

12) An object has a weight of 5.5 N and an of 3.5 N when fully submerged. Will the object float?

13) Calculate the of the object in the previous problem.

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