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Before jumping on the merry-go-round, the person was moving in the same direction as the merry-go-round's rim. What is the final angular speed of the merry-go-round?
An alpha particle (the nucleus of a helium atom formed by 2 protons and 2 neutrons with charge q = +2(1.6 x 10-19 C ) is moving perpendicular to a magnetic field of 0.790 tesla at a velocity of 4.60
At serve, a tennis player aims to hit the ball horizontally. If the player launches the ball from a height of 2.5 m and just clears a 0.90 m-high net about 15 m away as shown in figure below, deter
After a while, you (an observer on earth) notice 15 minutes have passed on the clocks of the spaceship. How much time has passes on your clocks (on earth)?
A hydraulic lift has pistons with areas 0.70 m^2 and 5.10 m^2 , and they're at the same height. With a 2.2 force on the smaller piston, how much mass can the larger piston support?
The observer and source relative to the ground and have the magnitudes indicated (v or 2v), where the speed v is 2.75 106 m/s. Calculate the observed frequency in each of the three cases.
A constant volume gas thermometer is calibrate in dry ice (-80.0 c) and in boiling ethyl alcohol (78.0). The respective pressures are 0.900 atm and 1.635 atm. what value of absolute zero does the ca
A 90 arrow is fired from a bow whose string exerts an average force of 120 on the arrow over a distance of 79 .What is the speed of the arrow as it leaves the bow?
The rod is pivoted at one end on a frictionless horizontal pin. The rod is initially held in a horizontal position but eventually allowed to swing down, What is its angular acceleration at the insta
You have a hospital traction device, with a cord that transmits an undiminshed tension of 5.0 g N, find the horizontal and vertical force exerted on the foot by the arragement?
Bonnie and Clyde are sliding a 300 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 445 N of force while Bonnie pulls forwar
The springs of a 1000 kg car compress 5.5 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations?
A ball of mass 0.640 kg moving east (+x direction) with a speed of 3.50 m/s collides head-on with a 0.840 kg ball at rest. If the collision is perfectly elastic, what will be the speed and directio
A location where the downward component of the Earth's magnetic field is 6.0 × 10-5 T. Find the magnitude of the induced emf between the tips of the wings when the speed of the plane is 225 m/
Sam, whose mass is 60.0kg , takes off down a 49.0 high, 8.00 degree slope on his jet-powered skis. The skis have a thrust of 220 N. Sam's speed at the bottom is 35.0 m/s. What is the coefficient of
After being initially at rest, it spins to an angular speed of 12 rad/s in a time of 4.3 seconds. What is the moment of inertia for disk if it spun about the edge of the disk? Answer in kg m2.
The diameter of the solenoid is 3.2. cm. the current in the solenoid is reduced to zero at a steady rate in 25 ms. what current appears in the coil.
A(n) 0.5 kg softball is pitched at a speed of 14 m/s. The batter hits it back directly at the pitcher at a speed of 22 m/s. The bat acts on the ball for 0.019 s. What is the magnitude of the averag
The length of the vibrating portion is 31.3cm and has a mass of 0.341g. Under what tension must the string be placed?
The distance between the two events is 2400 m in reference frame. What is the time interval between the events in reference frame.
A 11.0 g bullet is fired horizontally into a 110 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring having spring constant 140 N/m. The bullet b
If a rocket leaves from earth and flies to planet X in 7 years by its onboard clock, how fast was it going ? Assume that the planet is at rest with respect to the Earth.
The mass of a star is 1.75·1031 kg and its angular velocity is 1.30E-7 rad/s. Find its new angular velocity if the diameter suddenly shrinks to 0.47 times its present size. Assume a uniform
When the spring is stretched to a total length of .60 m, it supports traveling waves moving at 4.5 m/s how fast will waves travel on this spring if it is stretched to .90 m.
A 65.5 kg ice skater moving to the right with a velocity of 2.67 m/s throws a 0.19 kg snowball to the right with a velocity of 21.7 m/s relative to the ground. What is the velocity of the ice skater