Question

a. Show that the rate of change of momentum = mass*
acceleration. Under what condition does this relation hold
b. write the mathematical form of Newton 's second law of motion. State condition if any.
c. How can Newton 's first law of motion be obtained from the second law of motion
d. Name the standard unit of force and define it.
e. How does the acceleration produced by a given force depends on mass of the body? Draw a graph to show it.
f. A force acts for 10s on a stationary body of mass 100 kg after which the force ceases to act . The body moves through a distance of 100 m in next 5 s. Calculate : 1. the velocity acquired by the body. 2. the acceleration produced by the force and. 3. the magnitude of the force

Answer 1

d.SI unit force is Newton per metre square
f.velocity=distance/time=100/5=20 metre per second
acceleration=velocity/time=20/10=2 metre per second squared
force=mass × acceleration=200 kg/m square