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Q1. One end of a uniform 4.60 m-long rod of weight w is supported by the cable at an angle of θ = 37° with the rod. The other end rests against a wall, where it is held by friction. The coefficient of static friction between the wall and the rod is μs = 0.575. Determine the minimum distance x from point A at which an additional weight w (the same as the weight of the rod) can be hung without causing the rod to slip at point A.
Q2. A softball player swings a bat, accelerating it from rest to 2.8 in a time of 0.30. Approximate the bat as a 2.6 uniform rod of length 0.92, and calculate the torque the player applies to one end of it.
calculate the total mechanical energy of the glider at any point in its motion. Calculate the maximum speed of glider.
A 2.16 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0320 m. The spring has force constant 840 N/m.
A board is 6 meters long. The center of mass is in the 2 meters from the left end. The board has a weight of 320 Newton's. How much force in Newtons is necessary to lift the right end while the other end stays on the ground.
A bicycle wheel is rotating at 45 when the cyclist begins to pedal harder, giving the wheel a constant angular acceleration of 0.42.
What is the gauge pressure of the water at the pump? Suppose steady, laminar flow of water, no viscosity, and no air drag on the water jet. The acceleration of gravity is 9.81 m/s2.
If a car travelling at 63 km/h will skid 18 m when its brakes lock, how far will it skid if it is travelling at 150 km/h while its brakes lock.
Smoke particles in the air typically have masses of the order of 10 to 16 kg. The Brownian motion (rapid, irregular movement) of these particles, resulting from collisions with air molecules, can be observed with microscope.
If you weigh 690 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 25.0 km.
Find out the effective coefficient of kinetic friction
Clifford is in a real hurry, however, and skips the speed ramp. Starting from rest with an acceleration of 0.49 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is the speed at which belt of the ramp is moving.
Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching police car. After the police car passes, observed frequency of the siren is 455 Hz. Establish the car's speeds from these observations.
Liquid nitrogen has a boiling point of 77.3 K and a latent heat of vaporization of 2.01 105 J/kg. A 60.0-W electric heating element is immersed in an insulated vessel containing 46.5 L of liquid nitrogen at its boiling point. How various kilograms of..
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