Speed
10 m/s
20 m/s
30 m/s
braking
distance
6.1 m
23.9 m
53.5 m
* to analyze the characteristics and performance of
the brakes on a 1500 kg car, researchers collected
the data shown in the table above. it shows the
car's speed when the brakes are first applied and
the corresponding braking distance required to
stop the car. the magnitude of the average
braking force on the car is most nearly
(a) 75,000 n
(b) 30,000 n
(c) 12.000 n
(d) 1600 n

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

The two required components for a generator

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?