A 8000kg vehicle moving with a speed of 10m/s is brought to rest at a distance of 50m by the application of breaks.The force acted on the vehicle is
-800N
-8000N
+8000N
+800N
Which of the following is not the 'Force at a distance?
Electrostatic force
Gravitational force
Frictional force
Magnetic force
Centre of gravity of a solid sphere is located at
the centre of the sphere
outside the sphere
geometric centre of the sphere
None of these
A ball of mass 100 g is moving with a velocity 10 ms-1. It is brought to rest after traveling a distance 5 m, by applying a resistive force. Then the retardation caused by the force is:
1 ms-1
10 ms-2
10 ms-1
- 10 ms-2
What is the unit of rate of of change of momentum?
Kgm / s
Nm / s
N
kgms
A body of mass 500g initially at rest, is acted upon by a force 10 kg f for 10s. Then the velocity acquired by the body is:
200 ms-2
100 ms-2
2000 ms-1
2000 ms-2
1kgwt is equal to
1kg
1N
9.8kg
9.8 N
In a vaccum chamber if a coin and feather are dropped from a height at the same time,which of them reach the bottom surface first?
coin
feather
both of them reach the bottom at the same time
cannot be predicted
Which of the following is a vector quantity?
Inertial mass
Gravitational mass
Weight
Both inertial and gravitational mass
