174 Answered Questions for the topic Forces

Forces

07/01/14

help with kilograms and force
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 is... more
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05/17/14

Applications of the Dot Product (Vectors)
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 answer from part a)   more
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Forces Physics Tension

04/10/14

Calculating force
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 in... more
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Forces Physics

02/26/13

A 23kg suitcase is being pulled with constant speed by a handle that is at an angle fo 25 degrees above the horizontial. Question below.
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... more
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Forces Physics

02/26/13

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 braking?
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... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
You plan to fly a model airplane of mass 0.550 kg that is attached to a horizontal string. The plane will travel in a horizontal circle of radius 5.10 m. (Assume the weight of the plane is balanced... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
Your moving company is to load a crate of books on a truck with the help of some planks that slope upward 33°. The mass of the crate is 98.0 kg, and the coefficient of sliding friction between it... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
A curve of radius 138 m is banked at an angle of 11°. An 762-kg car negotiates the curve at 82 km/h without skidding. Neglect the effects of air drag and rolling friction. Find the following.(a)... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
The radius of curvature of a loop-the-loop for a roller coaster is 14.0 m. At the top of the loop, the force that the seat exerts on a passenger of mass m is 0.35mg. Find the speed of the roller... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
Suppose you ride a bicycle in a 21.6-m-radius circle on a horizontal surface. The resultant force exerted by the surface on the bicycle (normal force plus frictional force) makes an angle of 13.8°... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
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... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
A 0.30 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 15° with the horizontal. Determine the speed of the stone.
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
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 and... more
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Forces Physics

02/18/13

forces physics problem - Please Help ASAP
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... more
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Forces Physics Friction

02/18/13

forces problem - Please Help ASAP
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... more
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Forces Physics Friction

02/18/13

forces problem - Please Help ASAP
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... more
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Forces Physics Friction

02/18/13

forces problem - Please Help ASAP
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 shortest... more
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Forces Physics Friction

02/18/13

Forces problem - Please Help ASAP
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... more
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Forces Physics Friction

02/18/13

Forces problem - Please Help ASAP
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... more
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Forces Physics Tension

02/12/13

Force of Tension Problem - Please Help ASAP
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... more
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Forces Physics

02/12/13

Forces problem - Please Help ASAP
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. (b)... more
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02/12/13

Atwood's Machine Problem - Please help ASAP
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.
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02/12/13

Theoretical Physics Motion Problem - Please help ASAP
A block of mass m slides across a frictionless floor and then up a frictionless ramp. The angle of the ramp is θ and the speed of the block before it starts up the ramp is v0. The block will slide... more
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Forces Physics

02/12/13

Forces Problem - Please help ASAP
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... more
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