Friction is a (1) that (2)
motion. It acts in a direction (3)
to the motion of
the object. There is (4)
exerted on an object that
moves on a (5)
than on a (6)
Friction opposes the motion of an object as it moves across a
surface. An object slows down (7)
on a rough
surface than on a smooth surface.​

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly

Sunidhi made a study chart about changes in states of matter. which headings best complete the chart?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?