Question

the strength of force expressed by
(1) Weight (ii) Mass
(iii) Magnitude
(iv) none of these
The force between two charged bodies is called :
(i) Muscular force (ii) Gravitational force (iii) Electrostatic force (iv) Magnetic force
Force acts on an object may change :
(0) Direction (ii) Shape (iii) Speed (iv) all of them
S.l. unit of force is :
(0)
Kg cm/sec2
(ii) gram cm/sec2 (iii)
Kg m/sec2
(iv) none of these
Fill in the blanks:
(a)Use of lubricants______
the friction.
(b)
Rolling friction is____ than sliding friction​

Answer 1

1. The strength of force expressed by Magnitude.

2. The force between two charged bodies is called electrostatic force.

3. All of them.

4. SI Unit of force is none of them.

Fill in the blanks :-

a) Use of lubricants reduces the friction.

b) Rolling friction is less than sliding friction.

Answer 2

1. (iii) Magnitude  

2. (iv) Electrostatic force

3. (i) Direction  

3. (iii) None of them

Fill in the blanks:

(a)Use of lubricants REDUCES the friction.

(b)  Rolling friction is LESS than sliding friction​