Second Law of Motion
Trending Questions
The product of mass and velocity is called:
momentum
acceleration
force
weight
What will be your observation when you are standing at the centre of the disc? Explain.
The angular momentum of a system of particles is not conserved when
Suppose that a box is accelerating at a rate of 2 m/s2 If the net force is tripled and the mass is doubled, then what is the new acceleration of the box?
- 2 m/s2
- 3 m/s2
- 4 m/s2
- 0 m/s2
- force
- mass
- velocity
- momentum
What is the second law of motion?
- Every action has an equal and opposite reaction
- An object remains at rest or of uniform motion unless compelled to change that state by an force
- The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force
- Both B and C
"An object of mass 100 Kg is accelerated uniformly from a velocity of 5 ms to 8 ms in 6 seconds. Calculate the initial and final momentum of the object. Also find the magnitude of the force exerted on the object."
- The rate of change of momentum of an object is directly proportional to the resultant force applied.
- The rate of change of momentum of an object is inversely proportional to the resultant force applied.
- Change of momentum of an object is inversely proportional to the resultant force applied.
- Change of momentum of an object is directly proportional to the resultant force applied.
- must be in uniform motion
- can be in uniform motion
- can be accelerating
- must be at rest
If two forces as shown in the figure are 6 N and 4 N are acting opposite. The mass of the object is 2kg. What is the acceleration of the mass?
3 m/sec2
2 m/sec2
4 m/sec2
1 m/sec2
- 500m/s
- 75m/s
- 10m/s
- 20m/s
- 5 N, downwards
- 49 N, upwards
- 49 N, downwards
- 5 N , upwards
- 10 sec
- 8 sec
- 7 sec
- 4 sec
F=k×m×(v−u)t; where k is a constant can be rewritten as:
F = m*p
F = m*p/t
F = m*a
F = 2 m*a
Time | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
Distance | 0 | 1 | 8 | 27 | 64 | 125 | 216 | 343 |
- Increasing with time
- Decreasing with time
- constant
- Data insufficient
- 6s
- 4s
- 7s
- 2s
- remains in its state of motion (rest or moving with constant velocity)
- come to rest
- accelerate non-uniformly
- accelerate uniformly
A force F produces an acceleration 'a' in a body. The same force produces an acceleration 8a in another body. What is the mass of the second body?
eight times the mass of the first body
mass does not play a role
eight times less than the mass of the first body
none of the above
- 48N, 3m/s2
- 48N, 5m/s2
- 45N, 2m/s2
- 48N, 2m/s2
Mass * change in velocity =
- 300 kg, 15 m s−2
- 100 kg, 5 m s−2
- 10 kg, 15 m s−2
- 100 kg, 15 m s−2
A particle is moving in a horizontal circle with constant speed. It has constant.
Velocity
Acceleration
Kinetic energy
Displacement
- ηmg(sinθ+μcosθ)vt
- mg(sinθ+μcosθ)vtη
- mg2(sinθη)vt.
- mg(μcosθ)vtη