Question

PHYSICS
Q1) Classiy following forces according to 'contact' or 'non-contact
a) Gravitational Force
b) Electrostatic Force
c) Magnetic Force
d) Frictional Force
e) Muscular Force
Q2) Write S.I units of Force and Pressure in terms of kg, m, sec etc.
Q3) Define Atmospheric forces.
Q4) State whether the following statements are true or false:-
a. The unit of force is Pascal.
b.Weight is measured in Newton
c. Pulling a cart needs direct contact with the object
d.Direction in which an object is pushed or pulled is measure of magnitude of force
e. interaction between two objects always involve direct physical contact.
Q6Define Atmospheric Pressure and write it units.

Answer 1

1.a. non contact force
b. contact force
c. non contact force
d. contact force
e. contact force

2.S.I unit of force is newton
S.i unit of pressure isNm/s

4.a. no
b. no
c. yes
d. yes
e. yes

Answer 2

Answer no.1:- Contact forces=Frictional force
=Mascular forces
Non contact forces=Gravitational force
Electrostatic force
Magnetic force

Answer no. 2:-SI unit of force is newton.
SI unit of pressure is pascal.
Answer no. 3:-Atmospheric forces are the forces which are produce in atmosphere.
Answer no. 4:-False,false, true,true,false.
Answer no. 5:-The weight of the air above the earths surface exerts pressure is known as atmospheruc pressure.