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A cannon fires a shell straight upward; 1.9 s after it is launched, the shell is moving upward with a speed of 16 m/s. Assuming air resistance is negligible, find the speed (magnitude of velocity) of the shell at launch and 4.9 s after the launch. (a) at launch m/s (b) 4.9 s after the launch m/s
a kangaroo jumps at an angle of 80deg above the horizontal with a velocity of 15 ms. if the mass of the kangaroo is 75
What would be the apparent weight in newtons of a passenger of the helicopter while it is accelerating upward
An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50s. what is the average speed of the object
An alpha particle is moving at a speed of 5x105 m/s in a direction perpendicular to a uniform magnetic field of strength 9x10-2 T. The charge on an alpha particle is 3.8x10-19 C and its mass is 5.9x10-27 kg.
A weight is suspended from two ropes, one of which makes an angle #1 = 35 degrees and angle 2 = 155 degrees measured form the horizontal, Find the tension in each of the two ropes
q.what is the magnitude of the apparent weight of a 84 kg astronaut 4800 km from the center of the earths moon in a
An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff
An L-R-C circuit has an inductance of 0.410 , a capacitance of 2.75×10?5 , and a resistance of R. What is the angular frequency of the circuit
A flywheel in a motor is spinning at 580 {rm rpm} when a power failure suddenly occurs. The flywheel has mass 40 {rm kg} and diameter 75 {rm cm}.
If the ?rst package travels with constant speed and takes time ΔT = 5.0 days to arrive as measured by the crew member on the space station, what distance does it travel in the frame of reference of the space station? Give your answer in units of l..
a popular method of distributing music used to be on disks that had a radius of about 0.3m and spun at a constant angular velocity of about pi radians per second. Find the tangential velocity at the inner and outer edges
assume that the total heat of vapourization 540 calg of water is just sufficient to supply the energy needed to tear 1
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