4. When a man of 80 kg is raised vertically through a distance of 10 m, the
work done in lifting him is
a. 0.8 J
b. 8 J
C. 800 J
d. 78400 J
12.0
5. The energy associated to the motion of an object is
a. kinetic energy
c. elastic potential energy
b. potential energy
d. mechanical energy
6. What is the potential energy (PE) of a 2-kg object raised to a height of 4m?
a. 784 J
b. 7.84 J
c. 784 J
d. 78.4 J
7. Power is
a. the strength of a force
b. the ability to do work
c. the rate of doing work
d. the product of energy and time.
8. Dan climbs a flight of stairs in 1.5 minutes. If he weighs 450 N and the
stairs is 10 m from the ground, how much power will he develop?
a. 50 W
b. 500W
c. 0.5 W
d. 5000 W
9. A bouncing ball possesses
a. potential energy
b. kinetic energy
c. both potential and kinetic energy
d. gravitational force
10. A 1000 kg car has a velocity of 17 m/s. What is the car's kinetic energy?
a. 144,500 J b. 145,600 J C. 156,000 J d. 155,450 J



pa help po need ko na ngayun..(respect the question)
di po lahat sa anwer key ay tama..so pls wag po answer key mag depends​