WorksheetsLower Secondary: Energy and Work
Total questions: 20
Worksheet time: 30mins
Energy is the (a) to do work.
SI unit for work is (a) .
Which are the different forms of energy?
Kinetic
Gravitational potential
Electrical
Height
Thermal
State the Principle of Conservation of Energy.
Which is the formulae for Kinetic Energy?
21mv2
mv2
2mv2
mgh
Given that KE=21mv2 , calculate the kinetic energy, in joule, of a 2 kg ball moving at 3 m/s.
(a)
Ryan is 40 kg, what is the gravitational potential energy he poses when standing on top of the slide? g = 10 N/kg
( GPE=mgh )
(a)
If Ryan has 800 J of gravitational potential energy at the top of the slide, suppose no energy loss to the surrounding, what is the kinetic energy he poses at the bottom of the slide?
( loss in GPE=gain in KE )
(a)
Work done by a constant force on an object is the product of the force and the (a) by the object in the direction of the force.
What is the formulae for calculating work done of a force?
disforce
force×dis
force+dis
force −dis
Lucas is holding a few books with the force F and walking in the direction as shown.
Is there any work done by F on the books? (Explain)
A girl is holding a box while standing, is there any work done by the girl on the box?
Yes
No
Maybe
A boy is pushing a wall, is there any work done by the boy on the wall?
Yes
No
Maybe
A lady lifted a box from the floor to her waist, is there any work done by the lady on the box?
Yes
No
Maybe
At which point does the cart poses the greatest amount of Gravitational Potential Energy?
(a)
(b)
(c)
(d)
At which point does the cart poses the greatest amount of Kinetic Energy?
(a)
(b)
(c)
(d)
Calculate the work done by the 5 N force on the box.
(a)
A crane lifts an 8-m long steel girder weighing 2600 N up 15 m off the ground. The crane did ___ of work.
0 J
39000 J
20800 J
2600 J
Kinetic energy is associated with ---.
speed
position
direction
temperature
What is your confidence level for the chapter?
Low
Medium
High
Highest
