A 2500kg automobile accelerates up a hill and increases speed from 10 mph to 55 mph...
A 2500kg automobile accelerates up a hill and increases speed from 10 mph to 55 mph along a 100m stretch of road. If the hill makes an angle of 5 degrees with the horizontal. Find the work done on the automobile.
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A 2500kg automobile accelerates up a hill and increases speed
from 10 mph to 55 mph...
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 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 car increases its speed from 30 mph to 60 mph in 10 seconds. (a) Determine...
A car increases its speed from 30 mph to 60 mph in 10 seconds. (a) Determine your acceleration, in m / s2 , assuming it is constant. (b) What distance, in meters, does it travel in that time?
A van accelerates down a hill (see figure below), going from rest to 30.0 m/s in...
A van accelerates down a hill (see figure below), going from rest to 30.0 m/s in 6.30 s. During the acceleration, a toy m = 0.490 kg) hangs by a string from the van's ceiling. The acceleration is such that the string remains perpendicular to the ceiling. (a) Determine the angle e. (b) Determine the tension in the string. +-/2 points SerCP10 4.P.039. My Notes + Ask Your Teacher A dockworker loading crates on a ship finds that a 21-kg...
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...
A 5-kg sled is sliding on a horizontal rough surface with a speed of 18 m/s....
A 5-kg sled is sliding on a horizontal rough surface with a speed of 18 m/s. The coefficier kinetic friction between the block and surface is 0.15. After travelling 25-m, it encounters as covered hill (where friction can be ignored) and slides uphill. The hill makes an angle of 38。 horizontal. (a) How much work is done against friction during the 25-m horizontal travel? the maximum elevation on the hill the block reaches? (c) How much work is done against...
1. A projectile is shot from the ground at speed v0=10 m/s making an angle q=50...
1. A projectile is shot from the ground at speed v0=10 m/s making an angle q=50 degrees with the positive direction of the x-axis (horizontal). Find the time at which the velocity vector makes an angle of 30 degrees with the positive direction of the x-axis (horizontal).
An car of mass m starts from rest and accelerates uniformly up a ramp. It reaches...
An car of mass m starts from rest and accelerates uniformly up a ramp. It reaches the top of the ramp in one second. The ramp has length L and makes an angle θ with the horizontal. Assume that all friction forces can be lumped together under a single force Ff associated with a single friction constant μk. Find the acceleration of the car in terms of L.
A 1250 kg car drives up a hill that is 16.2 m high. During the drive,...
A 1250 kg car drives up a hill that is 16.2 m high. During the drive, two nonconservative forces do work on the car: (i) the force of friction, and (ii) the force generated by the car's engine. The work done by friction is -2.91 times 10^5 J; the work done by the engine is 6.64 times 10^5 J. Find the change in the car's kinetic energy from the bottom of the hill to the top of the hill.
A truck accelerates uniformly from rest to 23.0 m/s in 5.4 s along a level stretch of road. Determine the average p...
A truck accelerates uniformly from rest to 23.0 m/s in 5.4 s along a level stretch of road. Determine the average power (in W) required to accelerate the truck for the following values of the weight (ignore friction). (a) 8.00 x 103 N X 9036000 Can you write an expression for the average power in terms of the vork done on the truck and the time over which this work occurs? How does the work done on the truck compare...
A van accelerates down a hill (see figure below), going from rest to 30.0 m/s in 6.30 s. During the acceleration, a toy m = 0.490 kg) hangs by a string from the van's ceiling. The acceleration is such that the string remains perpendicular to the ceiling. (a) Determine the angle e. (b) Determine the tension in the string. +-/2 points SerCP10 4.P.039. My Notes + Ask Your Teacher A dockworker loading crates on a ship finds that a 21-kg...
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...
A 1250 kg car drives up a hill that is 16.2 m high. During the drive, two nonconservative forces do work on the car: (i) the force of friction, and (ii) the force generated by the car's engine. The work done by friction is -2.91 times 10^5 J; the work done by the engine is 6.64 times 10^5 J. Find the change in the car's kinetic energy from the bottom of the hill to the top of the hill.
A truck accelerates uniformly from rest to 23.0 m/s in 5.4 s along a level stretch of road. Determine the average power (in W) required to accelerate the truck for the following values of the weight (ignore friction). (a) 8.00 x 103 N X 9036000 Can you write an expression for the average power in terms of the vork done on the truck and the time over which this work occurs? How does the work done on the truck compare...
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