WorksheetsWork & Energy
Total questions: 7
Worksheet time: 5mins
Which of the following is/ are unit(s) for work?
I. Watt.
II. Joule.
III. Newton.meter
II only
III only
I and II only
II and III only
In which of the following cases is the net work positive?
Work done to hold a set of 25 kg barbells and walk forward.
Work done to raise and lower a set of 25 kg barbells to and from the floor ten times.
Work done to hold a set of 25 kg barbells at a constant height for 3 min.
Work done to kick a set of 25 kg barbells and cause them to roll across the floor.
If the force on an object is in negative direction, the work it does on the object must be
zero
positive
negative
The work could be either positive or negative depending on the direction the object moves
Person X pushes twice as hard against a stationary brick wall as person Y. Which of the following statements is correct?
Both do zero work
Both do positive work, but person X does four times the work of person Y
Both do positive work, but person X does twice the work of person Y
Both do the same amount of positive work
What is the kinetic energy of a 3.0kg object moving with a constant velocity of 2.0m/s?
3.0 J
6.0 J
9.0 J
12 J
What is the form of energy in this picture?
Kinetic energy
Elastic energy
Nuclear energy
gravitational potential energy
__________ is the ability to do work.
power
energy
watts
efficiency
