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A 75.0 kg stunt man jumps from a balcony and falls 26.5 m before colliding with a pile of mattresses.If the mattresses are compressed 0.950m before he is brought to rest, what is the average force exertedby the mattresses on the stuntman?
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A scaffold that weighs 400 N supports two painters, one 500 N and the other 400 N. The reading in the left scale is 800 N. What is the reading in the right hand scale
You are designing a digital camera, and want each detector element to have a width equal to the distance between the first zeros of the first zeros of the diffraction-limited point spread function
When two tuning forks of 128 Hz and 149 Hz, respectively, are sounded simultaneously, how various beats per second are heard.
A river 98.2 m wide flows toward the south at 35.8 m/min. A girl on the west bank wishes to reach the east bank in the least possible time. How far downstream does she travel
What are the magnitudes of the (a) impulse and (b) average force on the passenger during the collision? If the passenger were to jump upward with a speed of 6.00 m/s relative to the cab floor just before the cab hits the bottom of the shaft, what ..
A Thermopane window of area 3.1 m^2 is constructed of two layers of glass, each 6 mm thick separated by an air space of 7mm. what is the heat loss through the window
When cars are equipped with flexible bumpers, they will bounce off each other during low-speed collisions, thus causing less damage. What was the speed of the lighter car just after the collision
A proton enters the gap between a pair of metal plates (an electrostatic separator) that produces a uniform, vertical electric field between them. Ignore the effect of gravity on the proton.
When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. How far from the Earth's surface must the spacecraft be
Suppose that the coefficient of kinetic friction between Zak's feet and the floor, while wearing socks, is 0.250. Knowing this, Zak decides to get a running start and then slide across the floor.
An aircraft carrier has a speed of 13 m/s relative to the water. What is the frequency of the sound heard by the crew on the ship
Typical large values for electric and magnetic elds attained in laboratories are about 1:0104 V/m and 2.0 T. Determine the energy density for each eld
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