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A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp that is inclined at an angle of 13.0° above the horizontal. The semi-trailer coasts to a stop after traveling 160 m along the ramp. What was the truck's initial speed? Neglect air resistance and friction.
A 4.3-m long plank with a weight of 164 N is place on a dock with 1.4 m of its length extended over the water. How far from the edge of the dock can the boy move until the plank is just on the verge of tipping
calculate the absolute pressure at an ocean depth of 1000m. assume that the density of sea water is 1024 kgm3 and that
On a perfect fall day (20oC) you are hovering at low altitude in a hot-air balloon, accelerating neither upwards nor downwards. Calculate the weight of the displaced air
A system consists of two particles. At = 0 one particle is at the origin; the other, which has a mass of 0.50 , is on the -axis at = 6.0. At = 0 the center of mass of the system is on the -axis at = 2.4. The velocity of the center of mass is given..
your are sitting in your car which is standing at the side of the road with the engine idling. in the rearview mirror
A small metal ball with a charge of 0.45 C and a mass of 34 g (0.034 kg) enters a region where there is a magnetic field of 0.55 T. From Newton's second Law, what is the magnitude of the acceleration of the charged ball
An unhappy rodent of mass 0.310kg , moving on the end of a spring with force constant 2.50N/m, If the constant b has the value 0.901kg/s, what is the frequency of oscillation of the mouse
A 2.5kg cannonball is fired from the top of a cliff. The cannonball leaves the cannon at a height of h=75 m above the ground below. what is the speed of the cannonball just before it hits the ground
two identical conducting spheres each having a radius of 0.500 cm are connected by a light 1.90 m long conducting wire.
A sphere with radius 0.185m has density p that decreases with distance r from the center of the sphere according to p=3250 kg/m^(3) - (8750 kg/m^(3))r. Find total mass of the sphere
Radio waves of wavelength 250 m from a star reach a radio telescope by two separate paths. Find what is the height of the cliff
A large parallel plate capacitor has plate separation of 0.98 cm and plate area of 230 cm2. How much work is done on the capacitor as the plate separation is increased to 1.96 cm
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