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An asteroid is moving along a straight line. A force acts alongthe displacement of the asteroid and slows it down. The asteroidhas a mass of 5.0×104 kg, and theforce causes its speed to change from 7800 to 4500m/s. (a) What is the work done by theforce? (b) If the asteroid slows down over adistance of 2×106 m determine themagnitude of the force.
A 15 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun. what was the muzzle speed of the bullet
here is a potential difference of 5.0 V between the ends of a 60 cm long graphite rod that has a cross-sectional area of 1.0 mm2. Find the resistance of the rod
Two concentric current loops lie in the same plane. The smaller loop has a radius of 3.0 cm and a current of 12 A. The bigger loop has a current of 20 A. What is the radius of the bigger loop
In one cycle, a freezer uses 780J of electrical energy in order to remove 1730J of heat from its freezer compartment at 10.0 oF. What is the coefficient of performance of this freezer
A mirror produces an image of the sun, and the image is located 0.9800 m from the mirror. What is the object height ho of the tree
A 0.045kg ball is propelled by a 2.15kg racquet from rest to a speed of 50.0m/s. If the two objects are in contact for 220ms, calculate the average force exerted by the racquet on the ball
What is the potential difference between the terminals of a battery that can impart 6.8×10?19 \rm J to each electron that moves between the terminals
A boat crosses a river with a width w=160m in which thecurrent has a uniform speed of 1.50m/s. What is the speed of the boat relative to a stationary shore observer
A basketball rolls without slipping down an incline of angle ?. The coefficient of static friction is ?s. Model the ball as a thin spherical shell. (Use any variable or symbol stated above along with the following as necessary: m for the mass of the ..
Young's modulus of nylon is 3.7 × 109 N/m2. A force of 6.0 × 105 N is applied to a 1.5-m length of nylon of cross sectional area 0.25 m squared
The power supply for a pulsed nitrogen laser has a 0.0050-mF capacitor with a maximum voltage rating of 30 kV, calculate the power of the laser pulse
A banked curve has been designed so that it is safest for a vehicle going 70mph. A 5512 lb vehicle travels with a speed of 60 mph on the curve. Calculate the force that the road exerts on the vehicle
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