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A person pulls a crate with 120 N of force against 100 N of friction a distance of 5 meters. Sketch a free body diagram showing the forces acting on the crate and find the energy the person expends pulling the crate, the amount of energy converted to heat via friction, and the increase in the kinetic energy of the crate.

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A 3 kg ball is traveling in a circle of radius 2 meters with a tangential velocity of 2 meters/second. Find the centripetal acceleration of the ball and the centripetal force acting on it.

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a person travels at a constant speed of 75 Km/h for 50.0 minutes; what is the average distance that this person covers?

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A box of books weighing 225 N is shoved across the floor of an apartment by a force of 397 N exerted downward at an angle of 33.1° below the horizontal. If the coefficient of kinetic friction between box and floor is 0.551, how long does it take to move the box 3.52 m, starting from rest?

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in a x-y plane a graph is given. P vector who has magnitude of 50 is in 1st quardent and makes an angle of 60 degree with x axis. and Q vector who has magnitude of 30 is in 4TH quardent and makes an angle of 30 degree with x axis. WHAT IS THE AREA OF P vector minus Q vector? like the answer might be in which quadrent lies P vector minus Q vector ?

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A rotational transition of the carbon monoxide molecule occurs at a frequency of 115.3GHz. Since this is electromagnetic radiation, the wave travels at the speed of light. What is the wavlength, in mm, of this transition?

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Sound from speakers registered an intensity level of 126dB when measured at a distance of 32m from the speakers. How far away would you have to be to hear a sound intensity level of 60dB.

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A person demonstrates the doppler effect by ringing a tuning fork that has a frequency of 262 z and running toward you with a velocity of 6.2m/s. What is the frequency that you hear? The speed of sound in the room is 343m/s.

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A force acts on 2 kg mass and gives it an acceleration of 3m/s2. What acceleration is produced by the same force when acting on a mass of (a) 1 kg (b) 4 kg (c) how large is the force?

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Given a system like the one you used in lab and the following numbers for the moment of inertia of the T, the radius of the vertical bar and the hanging mass calculate the expected acceleration of the system.

I = 0.040 kg m2

r = 0.015 m

m = 0.500 kg

I = 0.040 kg m2

r = 0.015 m

m = 0.500 kg

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