Help me out solving these ques 12.
13.
A cardboard board and its contents (total mass
30 kg) are pushed across a rough floor at a steady
rate of 0.8 m s-l. When the box is no longer pushed,
it comes to rest in a distance of 0.5 m. What frictional
force acts on the box while it is being pushed?
- 19.2 N)
(Ans.
A force F applied to an object of mass ml produces
an acceleration of 3 m s-2. The same force applied
to a second object of mass rn2 produces an
acceleration of 1 m s-2. (a) What is the value of the
ratio
rn2
(b) If ml and are combined
find their
acceleration under the action of the force.
(Ans. 1/3 , 0.750 m s-2)
