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To move a large crate across a rough floor, you push on it with a force F at an angle of 21°, below the horizontal. Find the acceleration of the crate, given that the mass of the crate is m = 31 kg, the applied force is 321 N and the coefficient of kinetic friction between the crate and the floor is 0.63.
q1. a shell fired from a cannon has a muzzle speed the speed as it leaves the barrel of 800 fts. the barrel makes an
A cannon is rigidly attached to a carriage, which can move along horizontal rails, but is connected to a post by a large spring, Find the maximum force the spring exerts on the carriage
how far will the bullet penetrate the block of wood.
Light behaves primarily as a wave when it...
a fresnel zone plate is prepared with a drawing program and printed on a laser printer. the printed zone plate has a
Two of Angie's friends are talking to each other at a distance of 3.0 m from where Angie stands. What sound intensity does he measure for the two talkers
The length of a certain wire is doubled and at the same time it's radius is reduced by a factor of 2
A man throws a rock from the top of a cliff that is 80.0 m above ground level with an initial speed of 39.0 m/s at an angle of 39.0° above the horizontal. Determine the time it takes for the rock to hit the ground below the cliff. Determine the hor..
Three vectors have the same magnitude of 12 units. They make angles of ?, 2 times ? and 3 times ? with respect to the x axis, where ? = 16 o. What is the magnitude of their vector sum
An ac generator with a frequency of 1.04 kHz and an rms voltage of 22.2 V is connected in series with a 2.20 k omega resistor and a 320mH inductor. What is the power factor for this circuit? cos (phi)
A single household circuit operates at 120 V and is protected by a 10 A circuit breaker. How many 50 W lamps can be operated simultaneously without tripping the circuit breaker?
a sound waves in air at 20 c has frequency of 150 hz and a displacement amplitude of 5.00 x 10-3 mm. for his sound wave
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