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Consider a person on the Moon who launches herself into a standing broad jump at 45 degrees. the average force generate during launching is F= 2W, and the distance over which this force acts is 70 c
While taking photographs in Death Valley on a day when the temperature is 51.0°C, Bill Hiker finds that a certain voltage applied to a aluminum wire produces a current of 1.000 A.
A bean is fired through a pipe by compressing a spring. The bean just clears the pipe of length l if the spring is compressed by distance d. How much should the spring be compressed for the bean to
What is the shortest time between flashes of light that will make a three-bladed propeller appear stationary when it is rotating with an angular speed of 15.6 rev/s?
The helicopter and the sensor both move only in the horizontal direction and have a horizontal acceleration of magnitude 2.60 m/s2. Ignoring air resistance, find the tension in the cable towing the s
A 1347-kg submarine rises straight up toward the surface. Seawater exerts both an upward buoyant force of 14,526 N on the submarine and a downward resistive force of 977 N. What is the submarine's a
A golf ball sitting of the surface of an unknown planet is struck by a golf club such that it is launched from the surface with an intial speed of 30.0 m/s at an angle of 20.0 degrees above the hor
A car starts from rest on a curve with a radius of 160 m and accelerates at 1.80 m/s^2. How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.10 m/s^2
Sam, whose mass is 70.0 kg, takes off down a 46.0 m high, 8.00^\circ slope on his jet-powered skis. The skis have a thrust of 180 N. Sam's speed at the bottom is 42.0 {\rm m/s}. What is the coeffici
The bullet remains embedded in the block, which is observed to slide a distance 0.260 m along the surface before stopping. What was the initial velocity of the bullet?
If the potential energy of the pendulum-Earth system is taken to be zero at the stone's lowest point, what is the total mechanical energy of the system?
A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 19.1° above the horizontal. The sledge moves a distance of 20.4 m on a horizontal su
A Mercedes-Benz 300SL (m = 1850 kg) is parked on a road that rises 15° above the horizontal. (a) What is the magnitude of the normal force?
A proton cyclotron has a magnetic field of .20T between it's poles and a radius of .40m. What is the maximum energy for the protons from this machine?
In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 4.3 at an angle of 15 below the horizontal. It is released 0.90 above the floor. Wh
An object is placed in front of a concave mirror, 27.0 cm from the mirror's focal point. The image formed by the mirror is five times farther away from the focal point. Calculate the focal length of
Given that the focal length of the eyepiece is 2.79 cm, and the focal length of the objective is 0.511 cm, calculate the magnitude of the angle subtended by the red blood cell when viewed through th
A 5-g lead bullet traveling in 20oC air at 300m/s strikes a flat steel plate and stops. What is the final temperature of the lead bullet? (Assume the bullet retains all heat.) The melting point of l
Two small plastic spheres, one charged to 21 nC and the other to -21 nC, are connected by a 26-mm-long insulating rod. Suppose this dipole is placed in a uniform electric field with strength 7.4*10^
A tank with a volume of 0.150 m3 contains 27.0oC helium gas at a pressure of 100 atm. How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27.0oC and absolute
A proton is released from rest just outside the surface. How far will it be from the surface of the cylinder when its speed has reached 2550 km/s? The mass of the proton is 1.67 × 10-27 kg and
A cannon shoots 5.0-kg cannon ball that carries a charge of 3.0 Coulombs at some angle above horizontal ground in a region in which there is a uniform electric field E and gravitational acceleration
A circular plastic disk with radius R = 2.00 cm has a uniformly distributed charge of Q = +(2.00 x 106)e on one face. A circular ring of width 30 μm is centered on that face, with the center of the
A wooden block of cross sectional area A and mass density ρ when floating in a liquid of density ρl displaces a volume V. If the block is displaced slightly from equilibrium (submerged, say)
Traveling at a speed of 18.0 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.600. What i