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A 1300-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 530 N. A force Farrowbold is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act on the car: its weight Warrowbold and the normal force FarrowboldN directed perpendicular to the road surface. The length of the road up the hill is 275 m. What should be the magnitude of Farrowbold, so that the net work done by all the forces acting on the car is +160 kJ?
To clear the net, the ball must rise at least 0.294 m. If the ball just clears the net at the apex of its trajectory, explain how fast was the ball moving when it left the racquet?
A 61 kg speed skater with the velocity of 16 m/s comes into a curve of 18 m radius. How much friction should be exerted between skates and ice to negotiate the curve.
A father racing his son has 1/2 the kinetic energy of the son, who has 1/3 the mass of the father, What are the original speeds of (b) the son
Driving in your car with a constant speed of 12 {rm m}/{rm s}, you encounter a bump in the road that has a circular cross-section. If the radius of curvature of the bump is 35 {rm m}, find out the apparent weight of a 69 person in your car as you ..
A man driving a car toward a large vertical wall sounds his horn. The car is traveling at 81 km/h. What is the frequency of the cars horn
If a 68.3 kg person were travelling at 0.960c (where c is the speed of light), what would be the ratio of the person's actual kinetic energy to the person's classical kinetic energy
A power supply maintains a potential difference of 86.1 V across a 1070-? resistor. What is the current in the resistor
Amy (mass 60kg) and initial velocity +7.5m/s, is skating on ice toward Bob (mass 90kg) and initial velocity +4.0m/s. They collide at some point. Determine amys final speed
A hydrogen atom initially in its ground state (n =1) absorbs a photon and ends up in the state for which n = 3. What is the energy of the absorbed photon
q1. charge of uniform density 80 ncm3 is distributed throughout a hollow cylinder region formed by two coaxial
a balloon filled with one liter of air is tied to a brick and dropped from a height of 4600m above sea level. what will be the volume of the baloon when it reaches sea level
Ideal incompressible water flows through a horizontal pipe of cross-sectional area 10.0 cm^2 at a pressure of 0.250 atm with a volume flow rate of 1.00 x 10^-3 m^3/s. What is the pressure at the valve
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