If the heat of 110 J is added to a gaseous system, whose internal energy is 40 J, then the amount of external work done is
180J
70J
110J
30J
The spring extends by x on loading, then energy stored by the spring is (if T is the tension in spring and k is
spring constant
Which of the following is not an inelastic collision ?
A man jump on a cart
A bullet embedded in a block
Collision of two glass ball
none of the above
C.
Collision of two glass ball
Inelastic collision:- The deformation may not be relieved and the two bodies could move together after the collision. A collision in which two particles move together after the collision is called completely inelastic collision. Collision in which momentum of the system is conserved but not the kinetic energy are called inelastic collisions. In the above cases, collision of two glass ball is an inelastic collision.
A force F acting on an object varies with distance x as shown here. The force is in newton and distance is in metre. The work done by the force in moving the object from x = 0 to x = 6 m is
4.5 J
13.5 J
9.0
18.0 J
A 5 A fuse wire can withstand a maximum power of 1 W in circuit. The resistance of the fuse wire is
0.2 Ω
5 Ω
0.4 Ω
0.04 Ω
A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. The work done by the force of gravity during the time the particle goes up is
-0.5 J
-1.25 J
1.25 J
0.5 J
A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of 45° with the initial vertical direction is
An alpha nucleus of energy bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to
v2
1/ m
1/ν4
1/ Ze
For inelastic collision between two spherical rigid bodies
the total kinetic energy is conserved
the total mechanical energy is not conserved
the linear momentum is not conserved
the linear momentum is conserved