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A boy of mass 60.0 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 8.0 m above the net. The firefight- ers lower their arms as he lands in the net so that he is brought to a complete stop in a time of 0.40 s.
(a) What is his change in momentum during the 0.40-s interval?
(b) What is the impulse on the net due to the boy during the interval? [Hint: Do not ignore gravity.]
(c) What is the average force on the net due to the boy during the interval?
An AM radio transmitter broadcasts 47.0 kW of power uniformly in all directions, What is the maximum electric field strength at this distance
Four identical masses of 2.1kg each are located at the corners of a square with 2.0m sides. What is the net force on any one of the masses
A Van de Graaff generator has a spherical dome of radius 20 cm. what is the maximum charge that can be held on the dome
Describe the method used to measure the Sun's shadow and in the drawing on page 18 what are the letters b and d used for?
question1a charged particle is fired into a cubical region of space where there is the uniform magnetic field. outer
One summer day, you decide to make a popsicle. You place a popsicle stick into a 9-oz glass of orange juice, How long does it take your popsicle to freeze
A car of mass 1203 kg collides head-on with a parked truck of mass 2000 kg. Spring mounted bumpers ensure that the collision is essentially elastic. what is the initial speed of the car
What is frequency of the fork
A body cools from 50 degre celcious to 49 degree celcious in 5 seconds. Hw long would it take to cool from 40 degree celcious to 39 degree celcious.
What is the strength of the electric field.
A car of mass M= 900-kg travelling at 45.0 kmh enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between road and car's tires.
find the angular displacement of the propeller.
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