Advertisements
Advertisements
प्रश्न
A motorcycle of mass 100 kg is running at 10 ms−1. If its engine develops an extra linear momentum of 2000 Ns, calculate the new velocity of a motorcycle.
Advertisements
उत्तर
Mass of motor cycle = m = 100 kg
Velocity of motor cycle = v1= 10 ms−1
Momentum of motor cycle = mv1 = 100 × 10 = 1000 Ns
When engine develops an extra linear momentum of 2000 Ns
Then total momentum of motor cycle = 1000 + 2000 = 3000 Ns
Let v2 = new velocity of the motorcycle.
Total momentum of motor cycle = mv2
3000 = 100 × v2
v2 = `3000/100` = 30 ms−1
APPEARS IN
संबंधित प्रश्न
If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator may be
(a) going up with increasing speed
(b) going down with increasing speed
(c) going up with uniform speed
(d) going down with uniform speed
A block of mass 0.2 kg is suspended from the ceiling by a light string. A second block of mass 0.3 kg is suspended from the first block by another string. Find the tensions in the two strings. Take g = 10 m/s2.
A particle of mass 0.3 kg is subjected to a force F = −kx with k = 15 N/m. What will be its initial acceleration if it is released from a point x = 20 cm?
The force of buoyancy exerted by the atmosphere on a balloon is B in the upward direction and remains constant. The force of air resistance on the balloon acts opposite the direction of velocity and is proportional to it. The balloon carries a mass M and is found to fall to the earth's surface with a constant velocity v. How much mass should be removed from the balloon so that it may rise with a constant velocity v?
Consider the situation shown in the following figure All the surfaces are frictionless and the string and the pulley are light. Find the magnitude of acceleration of the two blocks.
Two bodies A and B of same mass are moving with velocities v and 2v, respectively. Compare their (i) inertia and (ii) momentum.
State Newton's second law of motion. Under what condition does it take the form F = ma?
Use Newton's second law of motion to explain the following instance :
An athlete prefers to land on sand instead of hard floor while taking a high jump .
What causes motion in a body?
In the previous problem (5.3), the magnitude of the momentum transferred during the hit is ______.
