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WorksheetsWork and Energy
Total questions: 20
Worksheet time: 19mins
A boy pushes a book kept on a table by applying a force of 4.5 N. find the work done by the force, if book is displaced through 30 cm along the direction of push
1.10 J
1.25 J
1.35 J
None
How much work is being done with 200 N of force to the right on object that moves 426 meters to the right? (assume the force and displacement are in the same direction)
85,200 J
45,620 J
90,480 J
62,329 J
What is the formula for calculating the total amount of mechanical energy?
ME = KE + PE
KE = ME + PE
PE = mgh
ME = 1/2 mv2
A box is pushed by 20 N force to the right and displace for 0.1 m. What is the work done?
0.005 J
0.1 J
1 J
2 J
A bungee rope has a spring constant of 5N/m. How much a person must weighs in Newton if we want it to extend (stretch) 10m?
20N
22cm
50N
50cm
21N
As speed increases, kinetic energy
Increases
Decreases
Stays the same
Increase then decrease
Which of the following is the best example of work being done.
doing homework
lifting a box
pushing a stationary box
holding a box
What would 54N be an example of?
work
power
distance
force
A boy pulls a 30 kg box up a smooth plane inclined at 30o to the horizontal as shown in figure. If the length of the plane is 5 m, calculate the work done in pulling the box to the top of the plane.
1471.5 J
129.9 J
1274.36 J
735.75 J
Figure shows a 10 N force acting on a box. The box moves 5 m to the right. Calculate the work done by the force.
50 J
50 N
O J
5 J
If 40 Watt of power dissipated for 30 min, how much work is done.
72000 J
7200 J
720000 J
720 J
Where is kinetic energy at its maximum?
a
b
c
d
C
D
E
