SI unit of force is
kg m/s
Newton
Dyne
Erg
Use of the lubricant
minimizes viscosity
minimizes the friction in machines.
maximize viscosity in machines
maximize the friction in machines
A force of 1.0 N acts on a body of mass10kg. The body covers 100cm in 4 seconds moving along a straight line. Find out the initial velocity ?
2 cm/s
4 cm/s
6 cm/s
5 cm/s
A 6 kg mass 'A' moving with a velocity of 2 m/s collides with a 4 kg mass 'B' moving with a velocity of 1.5 m/s in the opposite direction in a straight line. If the two masses get stuck , then the velocity of the combination is:
0.4 m/s
0.2 m/s
0.1m/s
0.6 m/s
An athlete can take a longer jump if he comes running from a distance as compared to that when he jumps suddenly. Identify the type of inertia.
Inertia of rest
Inertia of motion
Inertia of direction
Inertia of position
Match the following and with their unit of measurment a) Displacement 1. ms-1 b) Speed 2. newton c) Acceleration 3. metre d) Force 4. Ns e) Momentum 5. ms-2
a-1, b-2, c-3, d-4, e-5
a-3, b-1, c-5, d-2,e-4
a-2,b-3,c-4,d-5, e-1
a-3, b-2, c-1, d-5, e-4
Impulse =
ma
Ft
mv
v-u/t
1N =
1kg m/s2
1kg/ms2
1kg/m/s2
1kg ms
When a carpet is beaten with a stick, dust comes out of it this is due to :
Gravitational force
Consider a body with mass m ,its momentum proportional to :
Speed
Volume
Density
Shape
