A bicyclist climbs a 2.7-mile-long hill that makes an angle of 2.8o with the horizontal. The...
A bicyclist climbs a 2.7-mile-long hill that makes an angle of 2.8o with the horizontal. The bike weighs 19.6 lbs, and the rider's weight is 190.6 lbs. How much work is done on the bike and rider by gravity?
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A bicyclist climbs a 2.7-mile-long hill that makes an angle of
2.8o with the horizontal. The...
A bicyclist maintains a constant speed of 4.00 m/s up a hill that is inclined at...
A bicyclist maintains a constant speed of 4.00 m/s up a hill that is inclined at 10.0 degrees with the horizontal. Calculate the work done by the person and the work done by gravity if the bicycle moves a distance of 19.0 m up the hill. The combined mass of the rider and the bike is 88.0 kg. 1) Calculate the work done by gravity. 2) Calculate the work done by the person.
A bicyclist is coasting straight down a hill at a constant speed. The mass of the...
A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 89.0 kg, and the hill is inclined at 13.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at the same constant speed. How much force (directed parallel to the hill) must be applied to the bicycle in order for the bicyclist to climb the hill? Number Units
Problem 40 A bicyclist maintains a constant speed of 4.00 m/s up a hill that is...
Problem 40 A bicyclist maintains a constant speed of 4.00 m/s up a hill that is inclined at 10.0 with the horizontal. Calculate the work done by the person and the work done by gravity if the bicycle moves a distance of 19.0 m up the hill. The combined mass of the rider and the bike is 86.0 kg. 1) Calculate the work done by gravity. (Express your answer to three significant figures.) kJ Submit You currently have 2 submissions...
6.5 A 75.0-kg painter climbs a ladder that is 2.75 m long leaning against a vertical...
6.5 A 75.0-kg painter climbs a ladder that is 2.75 m long leaning against a vertical wall. The ladder makes a 30.0 degree angle with the wall. (a) How much work does gravity do on the painter? (b) Does the answer to part (a) depend on whether the painter climbs at constant speed or accelerates up the ladder?
A car is traveling down a hill that makes an angle of 17° with the horizontal....
A car is traveling down a hill that makes an angle of 17° with the horizontal. The driver applies her brakes, and the wheels lock so that the car begins to skid. The coefficient of kinetic friction between the tires and the road is μK = 0.53. (a) Find the acceleration of the car. (Take down the ramp to be the positive direction) (b) How long does the car take to skid to a stop if its initial speed is...
A car is traveling down a hill that makes an angle of 17° with the horizontal....
A car is traveling down a hill that makes an angle of 17° with the horizontal. The driver applies her brakes, and the wheels lock so that the car begins to skid. The coefficient of kinetic friction between the tires and the road is μK = 0.59. (a) Find the acceleration of the car. Take down the ramp to be the positive direction. (b) How long does the car take to skid to a stop if its initial speed is...
A car is traveling down a hill that makes an angle of 25° with the horizontal....
A car is traveling down a hill that makes an angle of 25° with the horizontal. The driver applies her brakes, and the wheels lock so that the car begins to skid. The coefficient of kinetic friction between the tires and the road is uk = 0.63. (a) Find the acceleration of the car. Take down the ramp to be the positive direction. Submit Answer Tries 0/5 (b) How long does the car take to skid to a stop if...
A box of mass m is sliding down an inclined plane. The plane makes an angle...
A box of mass m is sliding down an inclined plane. The plane makes an angle ϴ with the horizontal ground. What is the magnitude of the component of the gravitational force that is parallel to the inclined plane? A. m g cosθ B. m g sinϴ C. 0 D. m g If you lift a 2 kg weight through a vertical distance of 1 m at constant velocity, how much work did you do on the weight? Assume the...
A 72.5-kg skier coasts up a snow-covered hill that makes an angle of 22.9 ° with...
A 72.5-kg skier coasts up a snow-covered hill that makes an angle of 22.9 ° with the horizontal. The initial speed of the skier is 8.71 m/s. After coasting a distance of 1.19 m up the slope, the speed of the skier is 3.74 m/s. (a) Find the work done by the kinetic frictional force that acts on the skis. (b) What is the magnitude of the kinetic frictional force?
A 73.8-kg skier coasts up a snow-covered hill that makes an angle of 30.5 ° with...
A 73.8-kg skier coasts up a snow-covered hill that makes an angle of 30.5 ° with the horizontal. The initial speed of the skier is 8.02 m/s. After coasting a distance of 1.99 m up the slope, the speed of the skier is 3.83 m/s. (a) Find the work done by the kinetic frictional force that acts on the skis. (b) What is the magnitude of the kinetic frictional force?
A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 89.0 kg, and the hill is inclined at 13.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist. Later, the bicyclist climbs the same hill at the same constant speed. How much force (directed parallel to the hill) must be applied to the bicycle in order for the bicyclist to climb the hill? Number Units
Problem 40 A bicyclist maintains a constant speed of 4.00 m/s up a hill that is inclined at 10.0 with the horizontal. Calculate the work done by the person and the work done by gravity if the bicycle moves a distance of 19.0 m up the hill. The combined mass of the rider and the bike is 86.0 kg. 1) Calculate the work done by gravity. (Express your answer to three significant figures.) kJ Submit You currently have 2 submissions...
6.5 A 75.0-kg painter climbs a ladder that is 2.75 m long leaning against a vertical wall. The ladder makes a 30.0 degree angle with the wall. (a) How much work does gravity do on the painter? (b) Does the answer to part (a) depend on whether the painter climbs at constant speed or accelerates up the ladder?
A car is traveling down a hill that makes an angle of 25° with the horizontal. The driver applies her brakes, and the wheels lock so that the car begins to skid. The coefficient of kinetic friction between the tires and the road is uk = 0.63. (a) Find the acceleration of the car. Take down the ramp to be the positive direction. Submit Answer Tries 0/5 (b) How long does the car take to skid to a stop if...
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