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a boy on a 2.2 kg skateboard initially at rest tosses a 7.5 kg jug of water in the forward direction. if the jug has a speed of 3.4 m/s relative to the ground and the boy and skateboard move in the opposite direction at 0.64 m/s, find the boy's mass. answer in units of kg.
question1consider a thin rod of mass 1.4 kg length 2.7 m and uniform density. the rod is pivoted at one end on a
A 68.4-kg bungee jumper is standing on a tall platform (h0 = 45.4 m). The bungee cord has an unstrained length of L0 = 8.73 m, Determine how far the bungee jumper is from the water when he reaches the lowest point in his fall
100.0 W tungsten filament bulb generates 95.0 W of heat, which dissipated through glass bulb which has radius of 3.00 cm and 0.500 mm thick. If thermal conductivity of glass is 0.836 W/m°C, determine difference in temp. between inner and outer sur..
the electric field has a constant value of 2.7 x 105 vm and is directed downward. the field is the same everywhere. the
A motorist drives south at 27.0 m/s for 3.90 min, then turns west and travels at 25.0 m/s for 2.40 min, and finally travels northwest at 40.0 m/s for 1.00 min. For this 6.40 min trip, find the values.
A 900- kg car collides with a 1300- kg car that was initially at rest at the origin of an x-y coordinate system. What was the initial speed of the lighter car
A model of the stretching vibrations of a polyethylene chain may be made by considering a linear chain of identical masses M connected by springs of alternating force constants C1 and C2. Calculate the characteristic frequencies of such a chain is th..
A rookie quarterback throws a football with an initial upward velocity component of 15.33 and a horizontal velocity component of 20.4. Overlook air resistance.
An 93-g arrow is fired from a bow whose string exerts an average force of 120N on the arrow over a distance of 77cm, What is the speed of the arrow as it leaves the bow
The radar system at an airport broadcasts 15 GHz with 150 kW. An approaching airplane with a 34 m^2 cross section is 24km away. Assume that the radar broadcasts uniformly in all directions and that the airplane scatters microwaves uniformly in all di..
An eagle is flying due east at 8.9 m/s carrying a gopher in its talons. What is the magnitude of the gopher's velocity as it reaches the ground
A wooden block weighing 7 N is at rest on top of a wooden desk. The coefficient of static friction between the block and the desk is 0.41. Find out the minimum horizontal force required to move the block if the following occurs.
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