Question 1 :
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?

Question 2 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d2b5f59b460d7261f610.JPG' /> In the given figure, a boy is moving on a straight road against a frictional force of 5 N. After travelling a distance of 1.5 km he forgot the correct path at a round about of radius 100m. However, he moves on the circular path for one and half cycle and then he moves forward upto 2.0 km. Calculate the work done by him.

Question 3 :
The Jog Falls in Karnataka state are nearly 20 m high. 2000 tonnes of water falls from it in a minute. Calculate the equivalent power if all this energy can be utilized? $(g = 10 ms^{–2})$

Question 4 :
1 J is the amount of work done on an object when a force of 1 N displaces it by ____ along the line of action of the force.

Question 6 :
Compare the power at which a butterfly of mass 1.0 g that flies upward at a rate of $0.5 ms^{–1}$ is moving upwards against the force of gravity. $(given g = 10 ms^{–2})$

Question 7 :
A person holds a bundle of hay over his head for 30 minutes and gets tired. Has he done some work or not?

Question 8 :
An object of mass, m is moving with a constant velocity, v How much work should be done on the object in order to bring the object to rest?

Question 9 :
A certain household has consumed 250 units of energy during a month. How much energy is this in joules?

Question 10 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d2e2f59b460d7261f64c.png' /> In the above fig. A force of 5 N is acting on an object. The object is displaced through 2 m in the direction of the force. If the force acts on the object all through the displacement, then what is the work done?