Question

5. Opening the door is an example of which type of force?
a) Contact force b) spring force c) non contact force d) magnetic force.
6. Name the force used in removing iron scrap form heap of mixed scrap.
a) Magnetic force b) electrostatic force c) Gravitation force d) frictional force.
7. The pressure of an object with the increase in altitude from earth surface.
a) Increase b) decrease c) same d) none.
8. 1 kg weight is equal to
a) 98 N.
b) 0.98 N c) 998 N d) 1000 N
9. A spring balance is used to measure
a) Mass
b) weight c) pressure d) force
10 Two boys A and B are applying force on a block. If the block moves towards the boy
A. which one of the following statement is correct?
a) Magnitude of force applying by A is greater than that of B
b) Magnitude of force applying by A is less than that of B
c) Net force on block towards B
d) Magnitude of force applied by A is equal to B​

Answer 1

Answer:

5.a

8.a9.a

Explanation:

hope it helps

Answer 2

The hinge force is another example of a contact force. Thus, considering the overall forces acting on the body we can conclude that the process of opening a door is facilitated by a contact force. Thus, we can conclude that option A is the correct answer among the given options.