1 Horse power equals about
7.46 watt
74.6 watt
746 watt
7460 watt
A body is at rest on the surface of the earth. Which of the following statement is correct?
No free is acting on the body
Only weight of the body acts on it.
Net downward force is equal to the net upward force.
None of the above statement is correct
A force of 15 Newton acts on a body of weigh 30 Newton. What is the acceleration produced in metres per second?
Take g = 10ms-2.
15.00
5.00
1.50
0.50
The ratio of 1 joule to 1 erg is
105
107
10-7
10-5
Which of the following is a vector physical quantity?
Work
Kinetic energy
Moment of force
Potential energy
A body dropped from top of a tower fall through 40 m during the last two seconds of its fall. The height of tower is( g = 10 m/s2 )
60 m
45 m
80 m
50 m
Two forces of 6 N and 8 N act on a body of mass 7kg. The maximum value of acceleration produced cannot be more than
2 ms-1
4 ms-1
6 ms-1
8 ms-1
A particle of mass m has momentum p.Its kinetic energy will be
mp
Which of the following units is associated with energy?
Nm-1
Jm-1
Ns
Kg m2 s-2
A machine gun has a mass of 10 kg.It fires 30 g bullets at the rate of 6 bullets per second with a speed of 400 m/s.What force must be applied to the gun to keep it in position ?
72 N
75 N
82 N
97 N
