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A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is open and at rest. A small 500-g ball is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. The ball rebounds with a speed of 16.0 m/s along the same line. What is the angular speed of the door just after the collision with the ball?
A uniform 1.4-kg rod that is 0.75 m long is suspended at rest from the ceiling by two springs, one at each end. Find the angle that the rod makes with the horizontal
A roofer accidently drops a bundle of shingles. If it hits the ground with a speed of 86 m/s, how fast was it moving 3 seconds earlier (g=10 m/s/s)
Two forces, vector F 1 = (6.85i hat-3.10j hat) N and vector F 2 = (4.35i hat-8.35j hat) N, What are the components of the particle's velocity at t = 11.6 s
Blood pressure in Argentinosaurus. If this long-necked, gigantic sauropod had a head height of 20.2 m and a heart height of 9.00 m, What was the blood pressure at the feet
Two streams of air, one at 1 bar, 27C and velocity of 30 m/s and the other at 5 bar, 227C and 50 m/s velocity, Find the velocity of the stream issuing out of the nozzle
q1. an archer puts a 0.26 kg arrow to the bowstring. an average force of 213 n is exerted to draw the string back 1.3
The string has a breaking-point force of 45 N. Illustrate what is the largest value v can have without the string breaking?
A projectile is fired with an initial speed of 49.6m/s at an angle of 41.2 degrees above the horizontal on a long flat firing range.
A 1.10 kg hollowball with a radius of 0.134 m, filled with air, is released fromrest at depth of 2.16 m in a pool of water. What is the work done by the net vertical force on the ball as the ball moves from the bottom of thepool to the surface
In the following figure, determine the direction of the current in resistor ab: As switch S is closed and As coil B is moved away from coil A with the switch closed;
The solution to Bernoulli's equation, The construction of a flat rectangular roof (3.9 m x 4.3 m) allows it to withstand a maximum net outward force of 20050 N.
A randomized comparative experiment started with 120 rural schools in Rajasthan and assigned 60 to this treatment and 60 to a control group. Random checks for teacher attendance showed that 21% of teachers in the treatment group were absent, as op..
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