What I Know (Pre-Test)
Multiple Choice: Choose the letter of the correct answer and write it in a separate sheet of paper
1. Which of the following situations shows work is done on an object?
A. A student reading a book
B. A customer pushing a cart
C. A nurse holding the medicine tray
D. A patient sitting in the emergency room
2. It is the rate of doing work.
A. Energy
C. Time
B. Power
D. Work
3. The unit of power is
A Joule
C. Second
8. Newton
D. Watt
4. A weightlifter presses a 400N weight 0.5m over his head in 2s. What is the power of the
weightlifter?
A. 25 J
C. 100 J
B. 25W
D. 100 W
5. How much power is required to do 180J of work in 2.45?
A 7.5W
B. 75W
C. 178 W
D. 430 W
6. The following statements are true of work EXCEPT
A. Work is a process of transferring energy.
B. Work is done if the object is gaining mass
C. If work is done on an object it gains energy.
D. If work is done by an object it losses energy
7. Which of the following situations shows NO work is done?
A. A boy pushing his toy cart
B. An audience sitting on the bench
C. A janitor pushing a chair to the corner
D. A bride throwing her bouquet of flowers
8. Imagine you are repeatedly lifting a weight into the air up to a height of 2 m. Assuming
in each lift you exerted an average force of 190 N how much work is done on
C. 300J
D. 380
the weight?
A 150 J
B. 200J
8. Which of the following statements below best describes that work is being done?
A The applied force does not make the object move.
B. The object moves perpendicular to the applied force
C The object moves in the same direction of the applied force.
D. The object moves opposite to the direction of the applied force​