The mean weight of 4 members of a family is 60 kg Three of them have the weight 56 kg, 68 kg and 72 kg respectively. Find the weight of fourth member.

Find the weight of a man whose mass is 50 kg.

The weight of an object whose mass is 1 Kg is ______.

The weight of a 1 kg mass object an Earth is ______.

Mahendra and Virat are sitting at a distance of 1 metre from each other. Their masses are 75 kg and 80 kg respectively. What is the gravitational force between them?

The mean weight per student in a group of 7 students is 55 kg. The individual weights of 6 of them (in kg) are 52, 54, 53, 56 and 54. Find the weight of the seventh student.