A snowboarder with a mass of 98kg is initially stationary on a hilltop, then slides down on the snowy incline with a kinetic friction coefficient of 0.030 between tl snowboard and the surface. The hill has an approximate angle of elevation equal to 38° from the horizontal and an uphill wind hits him with a force of 0.80N. If the hill is 120m high, what is the speed of the snowboarder as he reaches the ground level? O 48m/s O 34m/s O 42m/s 30m/s

A snowboarder with a mass of 98kg is initially stationary on a hilltop, then slides down on the snowy incline with a kinetic friction coefficient of 0.030 between tl snowboard and the surface. The hill has an approximate angle of elevation equal to 38° from the horizontal and an uphill wind hits him with a force of 0.80N. If the hill is 120m high, what is the speed of the snowboarder as he reaches the ground level? O 48m/s O 34m/s O 42m/s 30m/s

Name: A snowboarder with a mass of 98kg is initially stationary on ahilltop
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: A snowboarder with a mass of 98kg is initially stationary on ahilltop, then slides down on the snowy incline with a kineticfriction coefficient of 0.030 between tlsnowboard and thesurface.The hill has an approximate angle of elevation equal to 38° f

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 100CP: The surface of the preceding problem is modified so that the coefficient of kinetic friction is...

See similar textbooks

Similar questions

Repeat the preceding problem, but this time, suppose that the work done by air resistance cannot be ignored. Let the work done by the air resistance when the skier goes from A to B along the given hilly path be —2000 J. The work done by air resistance is negative since the air resistance acts in the opposite direction to the displacement. Supposing the mass of the skier is 50 kg, what is the speed of the skier at point B ?
Consider a particle on which a force acts that depends on the position of the particle. This force is given by . Find the work done by this force when the particle moves from the origin to a point 5 meters to the right on the x-axis.
At the start of a basketball game, a referee tosses a basketball straight into the air by giving it some initial speed. After being given that speed, the ball reaches a maximum height of 4.25 m above where it started. Using conservation of energy, find a. the balls initial speed and b. the height of the ball when it has a speed of 2.5 m/s.
An electric scooter has a battery capable of supplying 120 Wh of energy. If friction forces and other losses account for 60.0% of the energy usage, what altitude change can a rider achieve when driving in hilly ter-rain if the rider and scooter have a combined weight of 890 N?
A 200-g steel ball is tied to a 2.00m “massless” string and hung from the ceiling to make a pendulum, and then, the ball is brought to a position making a 30 angle with the vertical direction and released from rest. Ignoring the effects of the air resistance, find the speed of the ball when the string (a) is vertically down, (b) makes an angle of 20 with the vertical and (c) makes an angle of 10 with the vertical.
A certain automobile engine delivers 2.24 104 W (30.0 hp) to its wheels when moving at a constant speed of 27.0 m/s ( 60 mi/h). What is the resistive force acting on the automobile at that speed?
Describe a situation in 4iich a force is exerted for a long time but does no work. Explain.
A block of mass 0.500 kg is pushed against a horizon-tal spring of negligible mass until the spring is compressed a distance x (Fig. P8.65). The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point , the bottom of a vertical circular track of radius R = 1.00 m, and continues to move up the track. The blocks speed at the bottom of the track is v = 12.0 m/s, and the block experiences an average friction force of 7.00 N while sliding up the track. (a) What is x? (b) If the block were to reach the top of the track, what would be its speed at that point? (c) Does the block actually reach the top of the track, or does it fall off before reaching the top?
A block of mass 0.500 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x (Fig. P7.79). The force constant of the spring is 450 N/m. When it is released, the block travels along a frictionless, horizontal surface to point , the bottom of a vertical circular track of radius R = 1.00 m, and continues to move up the track. The blocks speed at the bottom of the track is = 12.0 m/s, and the block experiences an average friction force of 7.00 N while sliding up the track. (a) What is x? (b) If the block were to reach the top of the track, what would be its speed at that point? (c) Does the block actually reach the top of the track, or does it fall off before reaching the top?
A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower if this takes 7.30s?
Check Your Understanding The spring Example 7.5 is compressed 6 cm from its equilibrium length. (a) Does the spring force do positive or negative work and (b) what is the magnitude?
Cite two examples in which a force is exerted on an object without doing any work on the object.