physics ncert solutions class 11th Physics Class 11th Laws of Motion

5.1 Give the magnitude and direction of the net force acting on

(a) A drop of rain falling down with a constant speed

(b) A cork of mass 10 g floating on water

(c) A kite skillfully held stationary in the sky

(d) A car moving with a constant velocity of 30 km/h on a rough road

(e) A high-speed electron in space far from all material objects, and free of electric and magnetic fields

239 Views | Posted 5 months ago

1 Answer

Answered by

Vishal Baghel | Contributor-Level 10

5 months ago

(a) Since the raindrop is falling at a constant speed, the acceleration is zero. When the acceleration is 0, the force acting on the drop will also become zero ( since F = ma)

(b) Since the cork is floating on water, the weight of the cork is balanced by upward force of water. So the net force on the cork is 0

(c) Since the kite is held stationary in the sky, the net force is 0

(d) Since the car is moving at a constant velocity, the acceleration is 0, hence the net force is also 0

(e) The net force acting on the high-speed electron will be zero since the electron is far from the material objects and free of electric and magnetic field

...more

0 Upvotes 0 Downvotes

Similar Questions for you

Two blocks of mass 10 kg and 5 kg are connected with a light string which passing over an ideal pulley attached with a fixed smooth wedge. If the system is released from rest, then the acceleration of the blocks will be

alok kumar singh

A block rests on an inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between block and the plane is 0.8. If the frictional force on the block is 10 N, then mass of block (in kg) (Take g = 10 m/s² )

alok kumar singh

Bullets of 0.03 kg mass each hit a plate at a rate of 200 bullets per second with velocity of 50 m/s and reflect back with velocity of 30 m/s. The average force acting on the plate in newton is

alok kumar singh