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Two horses pull a large crate of negligible mass at constant speed across a barn floor by means of two light steel cables. What is the work done by each horse
A 1792 kg safe is 3.01 m above a heavy-duty spring when the rope holding the safe breaks. What is the spring constant of the spring
Four identical springs are used as part of a car's suspension system, one on each wheel. What will be the frequency at which the car will bounce
A spinning flywheel has rotational inertia I = 401.0 kg · m2. Its angular velocity decreases from 20.4 rad/s to zero in 261.6 s due to friction
The nucleus of radioactive polonium-210, with a mass of about 3.49?10?25kg , is known to decay by emitting an alpha particle with a mass of about 6.68?10?27kg. what is the recoil speed of the remain
A 27.4 kg runaway grocery cart runs into a spring with spring constant 387 N/m and compresses it by 75.5 cm. What was the speed of the cart just before it hit the spring
A 70 kg crate is pushed at constant speed up the frictionless 35° ramp shown in the figure. What horizontal force F is required? What force is exerted by the ramp on the crate
A toy car with a mass of 120 g moves to the right with a speed of 0.43 m/s. What is the change in speed of the car
600g model rocket is on a cart that is rolling to the right at a speed of 4.5m/s. At what horizontal distance left of the loop should you launch
An insect 4.00mm tall is placed 20.0cm to the left of a thin planoconvex lens. Calculate the location of the image this lens forms of the insect
The average density of the planet Venus is 5219 kg/m3. The acceleration of gravity on its surface is 8.84 m/s2. Calculate the average radius of Venus
A proton (mass 1.67 × 10 ?27kg) is moving at 1.15 ×10 ?6m/s directly toward a stationary helium nucleus (mass 6.64 × 10 ?27kg). After a head-on elastic collision, what is the helium'
A speck of dirt is embedded 3.00cm below the surface of a sheet of ice having a refractive index of 1.309. What is the apparent depth of the speck
One of the limitations on the design of modern windmills for the generation of electricity is that the tip of the blades must not exceed the speed of sound in air, What is the acceleration of the bl
A student sits on a rotating stool holding two 3.5 kg objects. When his arms are extended horizontally, Find the kinetic energy of the student before and after the objects are pulled in
A cue ball traveling at 0.80 m/s hits a stationary 8-ball, which moves off with a speed of 0.27 m/s at an angle of 35° relative to the cue ball's initial direction. at what angle will the cue ba
A bicycle rim has a diameter of 0.65 m and a moment of inertia, measured about its center, of 0.15kg?m2 What is the mass of the rim
A flint glass plate (n = 1.66) rests on the bottom of an aquarium tank. The plate is 10.00 cm thick (vertical dimension), Calculate the apparent thickness of the plate
An object with a mass of 5.5 kg is allowed to slide from rest down an inclined plane. What is the speed of the object at the bottom of the plane
A 29 cm long solenoid, 1.8 cm in diameter, is to produce a 0.24 T magnetic field at its center. If the maximum current is 5.7 A, how many turns must the solenoid have
The average density of the planet Uranus is 1263 kg/m3. Calculate the average radius of Uranus
A 2.1 ? 103-kg car starts from rest at the top of a 4.5-m-long driveway that is inclined at 15° with the horizontal. find the speed of the car at the bottom of the driveway
Amy and Jessie are on a camping trip near a river. Jessie is floating on an inner tube raft, What angle does Amy's boat have to make so that she can follow the path straight to the island
A particular constant, horizontal force exerted on a particular object free to slide on a level, what is the new value of acceleration
An electron starts from rest 54.9cm from a fixed point charge with Q = -0.278uC. How fast will the electron be moving when it is very far away