A box of mass 22 kg slides down a 22o slope with a coefficient of friction of 0.13. Find: a)the weight of the box b) the normal force on the box c) the frictional force...
A box of mass 22 kg slides down a 22o slope with a coefficient of friction of 0.13. Find: a)the weight of the box b) the normal force on the box c) the frictional force...
If a propeller, on a stationary mounting, blows back 36kg of air per second at a speed of 45 knots, what thrust does it produce?
2. if you are using a hammer to hit a stake into the ground why will the acceleration of the hammer be less than the acceleration of the stake? a. force of the hammer...
alicia is pushing a box with a mass of 5 kilograms across a floor. jake is pushing a box with a mass of 10 kilograms across a floor. how much force will jake have to exert on the box he...
A force, F of 25 N is acting in the direction of a = (6,1). a) Find a unit vector in the direction of a. b) Find the Cartesian vector representing the force, f, using your...
A 32.8-kg traffic light is supported by two wires. T1 is of the right wire which connects to the vertical pole at 30 degrees below horizontal. T2 is of the left wire which connects to the...
At a building site, an iron girder of mass 400 kg is suspended from a crane by a steel cable. Assume that the cable has a circular cross-section of diameter 24 mm. a.What is the tensile force...
A block of mass M = 16 kg with a pulley attached slides along a frictionless ledge. It is connected by a massless string to a block of mass m = 5.2 kg. (a) Find the acceleration of each block...
Both sides of wire start out with 5 washers with the total mass of 5m. When N washers are transferred from the left side to the right side, the right side descends 70.56 cm in 0.60 s. Find N...
A 74.4-kg airplane pilot pulls out of a dive by following, at a constant speed of 184 km/h, the arc of a circle whose radius is 282.0 m. (a) At the bottom of the circle, what are the direction...
A 15000-kg helicopter is lowering a 4300-kg truck by a cable of fixed length. The truck, helicopter, and cable are descending at 17.0 m/s and must be slowed to 5.00 m/s in the next 56.0 m of descent...
A 23kg suitcase is being pulled with constant speed by a handle that is at an angle fo 25 degrees above the horizontial. If the normal force exerted on the suitcase is 200N, what is the F applied...
Driving home from school, you spot a ball rolling out into the street. You brake for 1.30s, slowing your 1000kg car from 17.0m/s to 10.0m/s. What was the average force exeerted on your car during...
You are racing in a rally on a snowy day when the temperature is near the freezing point. The coefficient of static friction between a car's tires and an icy road is 0.170. Your crew boss is concerned...
In the figure below, m1 = 3.2 kg, m2 = 5.8 kg, and the coefficient of kinetic friction between the inclined plane and the 3.2-kg block is μk = 0.25. Find the magnitude of the acceleration of the masses...
The coefficient of static friction between a rubber tire and the road surface is 0.85. What is the maximum acceleration of a 1042-kg four-wheel-drive truck if the road makes an angle of 12.7° with...
A sky diver of mass 66 kg can slow herself to a constant speed of 99 km/h by orienting her body horizontally, looking straight down with arms and legs extended. In this position, she presents the...
A rear-wheel-drive car supports 48% of its weight on its two drive wheels and has a coefficient of static friction of 0.60. (a) What is the vehicle's maximum acceleration? (b) What is the...
An automobile is going up a grade of 15° at a speed of 25.5 m/s. The coefficient of static friction between the tires and the road is 0.70. (a) What minimum distance does it take to stop the car...
A 0.70 kg stone attached to a string is whirled in a horizontal circle of radius 28 cm as in the figure below. The string makes an angle of 30° with the vertical. (a) Find the speed of the stone...