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CBSE Notes 2011-2012 » XI-Physics

Motion in a Plane

Sudden motion on a blanket, removes dust. How ?

Short answer question

Sudden motion on a blanket, removes dust. How ?

How many newtons make one kg wt.

Short answer question

How many newtons make one kg wt.

A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of the net f...

Short answer question

A pebble of mass 0.05 kg is thrown vertically upwards. Give the direction and magnitude of
the net force on the pebble.
(a) during its upward motion.
(b) during its downward motion.
(c) at the highest point where it is momentarily at rest. Do your answers change if the
pebble was thrown at an angle of say 45

Give the magnitude and direction of the net force acting on (a) a drop of rain falling down with a c...

Short answer question

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 gravitating objects, and free of electric and
magnetic fields. (NCERT)

Name the quantity that remains conserved in rocket propulsion.

Short answer question

Name the quantity that remains conserved in rocket propulsion.

When a bomb explodes in mid-air, at its highest point, what is the direction of motion of its core ?

Short answer question

When a bomb explodes in mid-air, at its highest point, what is the direction of motion of its core ?

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