Advertisements
Advertisements
Question
Give two examples each of contact and non-contact forces.
Advertisements
Solution
Contact Forces:
(i) Pushing a pile of rubble by a bulldozer.
(ii) Squeezing of a gum tube to extract the gum.
Non-contact Forces:
(i) When a magnet is brought near iron-nails, they stick to the magnet.
(ii) A ripen apple falls by itself from the tree.
RELATED QUESTIONS
Give one example in the case where Force is at a distance.
Complete the following
1 N = ..........dyne.
Complete the following:
1 N = ............kgf (approx)
A truck of mass `5 xx 10^3` kg starting from rest travels a distance of 0.5 km in 10 s when a force is applied on its calculate:
1) the acceleration acquired by the truck and
2) the force applied
Why is it easier to open a door by applying the force at the free end of it?
______ has to be applied to change the ______ of a ______ object.
(moving, direction, force)
If we apply force against the direction of motion of the body, then the body will
Plotting a graph for momentum on the Y-axis and time on X-axis. the slope of the momentum-time graph gives
Derive the unit of force using the second law of motion. A force of 5 N produces an acceleration of 8 m s–2 on a mass m1 and an acceleration of 24 m s–2 on a mass m2. What acceleration would the same force provide if both the masses are tied together?
Briefly explain how we experience a force in our daily life.
