Worksheetsprep1 lesson 1 unit 2
Total questions: 9
Worksheet time: 5mins
1-Resource of permanent energy is.................................
a. petrol.
b. the Sun.
c. nuclear reaction.
d. coal.
2-Weight of the body on the Earth equals its..........................
a. mass + gravity acceleration,
b. mass x gravity acceleration.
c. mass + gravity acceleration.
d.mass - gravity acceleration.
3-potential energy of an object at the mountain top is ........................ the potential energy of the same object at the ground .
a. greater than
b. equal to
c. less than
d. half
4-An object of 20 N. weight is placed at 5 m. height, it has a potential energy of.................
a.50 J.
b. 150 J.
c. IOOJ.
d.200J.
5- the mechanical energy of the pendulum at the highest point equals.......................
a kinetic energy only.
energy only.
b. kinetic energy x potential energy.
c. kinetic energy + potential energy.
d. potenial energy only
7-When you do work to displace a pendulum away from its rest position, this work is stored in the ball as a...........................
a. thermal energy.
b. potential energy.
c. kinetic energy.
d.chemical energy.
8-In the simple pendulum. there is an energy transformation from.......
a. mechanical energy into a sound one.
b. mechanical energy into a light one.
c. potential energy into a kinetic one and vice versa.
d. kinetic energy into a heat one.
9- Kinetic energy =
10-As an object falls downwards
a. the potential energy increases gradually.
b. the kinetic energy increases gradually.
c. the mechanical energy is lost.
d. the speed of the object decreases gradually.
