A 50 kg skier is pulled up a 28° slope at a constant speed by a
friend applying a fore of 300N. The kinetic friction between the
snow and the skier?
a. 0.18
b. 0.30
c. 0.36
d. 0.63
A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 25.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 46.5 kg, and the coefficient of kinetic friction between the skis and the snow is 0.158. Find the magnitude of the force that the tow bar exerts on the skier.
A 62-kg skier grips a moving rope that is powered by an engine and is pulled at constant speed to the top of a 23∘ hill. The skier is pulled a distance x = 310 m along the incline and it takes 2.0 min to reach the top of the hill.If the coefficient of kinetic friction between the snow and skis is μk = 0.10, what horsepower engine is required if 30 such skiers (max) are on the rope at...
A skier of mass 67 kg is pulled up a slope by a motor-driven cable. a) How much work is required to pull him 65 m up a 30° slope (assumed frictionless) at a constant speed of 3.5 m/s? _________kJ (b) What power (expressed in hp) must a motor have to perform this task? _______hp
A skier is pulled by a towrope up a frictionless ski slope that makes an angle of 12 degrees with the horizontal. The rope moves parallel to the slope with a constant speed of .0m/s. The force of the rope does 900J of work on the skier as the skier moves a distance of 8.0m up the incline. (a) If the rope moed with a constant speed of 2.0m/s, how much work would the force of the rope do on...
A skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 8.9° with the horizontal. The rope moves parallel to the slope with a constant speed of 1.1 m/s. The force of the rope does 640 J of work on the skier as the skier moves a distance of 5.9 m up the incline. (a) If the rope moved with a constant speed of 2.4 m/s, how much work would the force of...
A skier is skiing downhill. The slope is inclined at 10o with respect to the horizontal. The skier’s mass is 65 kg and the value of the coefficient of kinetic friction between the skis and the snow is 0.18. What is her acceleration? a. 0.035 m/s2 uphill b. 0.0036 m/s2 uphill c. 0.0 m/s2 d. 0.95 m/s2 downhill
15. A 150 N sled is pulled up a 25° slope at a constant speed by a force of 130 N. What is the coefficient of kinetic friction between sled and slope? A) 0.49N B) 0.1125 N C) 0.546 N D) 0.195 N E) 0.288 N 16. A student weighing 100 N climbs a flight of stairs 3.0 m high in 4 s. What power is required to perform this task? A) 0.1 Hp B) 40 W C) 2.6 Hp...
. A 58-kg skier is being pulled up a 12 ̊ frictionless slope. What power is required for the skier to cover the entire 1.2 km slope in 4.5 min?
A skier of mass 72 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 85 m up a 30 degree slope (assumed frictionless) at a constant speed of 2.2 m/s? Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. (b) What power (expressed in hp) must a motor have to perform this task? Your response differs significantly from the correct...
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?