# Forces in Living Things and Work Test Review

 Date 04.06.2018 Size 17.9 Kb.

Name _____________________________________________________ Date __________________ Period _____

Forces in Living Things and Work Test Review

1. Define Geotropism the response of a plant part to gravity

2. Give examples of positive and negative geotropism
 Positive Geotropism Negative Geotropism Movement of the plant roots downward with gravity Movement of the plant stem upward against gravity

1. What do cell walls provide for a plant? Structure, support, rigidity

2. Turgor pressure in plants results when cells are full of water

3. If a living plant were moved from a freshwater aquarium to a saltwater aquarium, what would happen? The plant’s cells would lose water

4. Why would plants wilt on a summer day? Loss of water and therefore lack of turgor pressure

5. Define Work Occurs when a force causes an object to move a distance in the same direction as the force.

6. List examples of forces push, pull, gravity, friction, turgor pressure

7. Give an example in which work is NOT being done. Carrying a backpack/holding a book above your head/pushing a wall

8. What is the formula we use to calculate work? W=F X D

9. What is the unit we use to describe Force? N, Newton

Name _____________________________________________________ Date __________________ Period _____

Forces in Living Things and Work Test Review

1. Define Geotropism _______________________________________________________ _______________________________________________________

2. Give examples of positive and negative geotropism
 Positive Geotropism Negative Geotropism

1. What do cell walls provide for a plant? ______________________________________________________________________________________________________________

2. Turgor pressure in plants results when _______________________________________________________

3. If a living plant were moved from a freshwater aquarium to a saltwater aquarium, what would happen? ______________________________________________________________________________________________________________

4. Why would plants wilt on a summer day? _______________________________________________________

5. Define Work _______________________________________________________ _______________________________________________________

6. List examples of forces _______________________________________________________

7. Give an example in which work is NOT being done. _______________________________________________________ _______________________________________________________

8. What is the formula we use to calculate work? ____________________________________________________

9. What is the unit we use to describe Force? _____

1. What is the unit we use to describe Work? J,Joules

2. What is the unit we use to describe distance? M,meters

3. An upward force of 50N is applied to a shovel as it is carried 20m across the yard. How much work is being done on the shovel?

1. Formula W=F X D

2. Substitution _W=50N X 0m

4. A force of 20N is applied by a chain to a trolley car to carry it up the hill. The work being done on the car is 400J. What is the height of the hill?

1. Formula d=W/F

2. Substitution d=400J/20N

5. A game show contestant won a prize by pushing a bowling ball 20 m using her nose. The amount of work done was 1470 J. How much force did the contestant exert on the ball?

F=W/d F=1470J/20m F=73.5N

1. Carlos does a chin-up in gym class and raises himself 0.8 m and holds there for 2 minutes. If Carlos has a mass of 62 kg and uses 600N of force, how much work does he accomplish?

W=F X D W=600N X .8m W= 480J

1. A football player picks up the football, runs with it, and throws it to a teammate. During which of these actions is work being done on the football? Explain. Picks up the football (lifting it up a distance in the same direction as the force) /throwing it to a teammate(throw it a distance and it moves in same direction as force)

2. List some safety rules. Wear goggles during a lab, no horseplay, no eating/drinking in the lab/ read lab procedures before going to lab stations/ add acid to water/ ask the teacher to clean up glass

1. What is the unit we use to describe Work? _____

2. What is the unit we use to describe distance? _____

3. An upward force of 50N is applied to a shovel as it is carried 20m across the yard. How much work is being done on the shovel?

1. Formula ____________________________________________

2. Substitution _________________________________________

4. A force of 20N is applied by a chain to a trolley car to carry it up the hill. The work being done on the car is 400J. What is the height of the hill?

1. Formula ____________________________________________

2. Substitution _________________________________________

5. A game show contestant won a prize by pushing a bowling ball 20 m using her nose. The amount of work done was 1470 J. How much force did the contestant exert on the ball?

1. Carlos does a chin-up in gym class and raises himself 0.8 m and holds there for 2 minutes. If Carlos has a mass of 62 kg and uses 600N of force, how much work does he accomplish?

1. A football player picks up the football, runs with it, and throws it to a teammate. During which of these actions is work being done on the football? Explain. _____________________________________ _______________________________________________________

2. List some safety rules. ______________________________________________________________________________________________________________