Podcast
Questions and Answers
Which of the following statements is true about work?
Which of the following statements is true about work?
Which physical quantity has magnitude but no direction?
Which physical quantity has magnitude but no direction?
Among a raised hammer, a bullet fired by a gun, a moving stone, and a rotating wheel, which can do the most work?
Among a raised hammer, a bullet fired by a gun, a moving stone, and a rotating wheel, which can do the most work?
If a force of 20 N displaces an object through 2 m and does 20 J of work, what is the angle between the force and displacement?
If a force of 20 N displaces an object through 2 m and does 20 J of work, what is the angle between the force and displacement?
Signup and view all the answers
Why is work considered a scalar quantity?
Why is work considered a scalar quantity?
Signup and view all the answers
If an object of mass 12kg is raised through a height of 1.5m, the work done on the object is equal to:
If an object of mass 12kg is raised through a height of 1.5m, the work done on the object is equal to:
Signup and view all the answers
In the scenario where an aeroplane travels 4000m and the work done is 20000J, what is the force applied on it?
In the scenario where an aeroplane travels 4000m and the work done is 20000J, what is the force applied on it?
Signup and view all the answers
The gravitational potential energy of an object above the ground is defined as the work done in lifting it from the ground to:
The gravitational potential energy of an object above the ground is defined as the work done in lifting it from the ground to:
Signup and view all the answers
If a car weighing 800kg increases its speed from 5 m/s to 10 m/s, the work done is approximately:
If a car weighing 800kg increases its speed from 5 m/s to 10 m/s, the work done is approximately:
Signup and view all the answers
When an object of 1kg is dropped to the ground from a height of 30m, what is the work done by the force of gravity?
When an object of 1kg is dropped to the ground from a height of 30m, what is the work done by the force of gravity?
Signup and view all the answers
