Question

4. Solve the following numericals:
a. Convert 3.12 mm into m and km.(4)
b. The weight of body is 420 N. Calculate its mass. [g=9.8
m/s?] (2)
Define acceleration When is the acceleration of a body is​

Answer 1

Answer:

a. 0.000003.12

B. f =m.a

420 = m.9.8

m =42.8571

C.

The definition of acceleration is a change in the rate of motion, speed or action. ... The rate of change of the velocity of a moving body. An increase in the magnitude of the velocity of a moving body (an increase in speed) is called a positive acceleration; a decrease in speed is called a negative acceleratio