505 Answered Questions for the topic AP physics

Ap Physics

07/13/17

if a crate is being moved at a constant velocity on a rough surface with an applied force at an angle what is the net work?
im also wondering if the work done by normal force and gravity are both 0 since the crate is only moving in the horizontal
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Ap Physics

07/11/17

A pendulum is pulled to a height of 1.28 m above the lowest position and released. What is its speed at the level of the lowest position?
 possible answers include    5.01 m/s 9.81 m/s 19.6 m/s 25.0 m/s none of these
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Ap Physics

07/11/17

Question is below please answer asap
A roller coaster car starts out at rest at the top of the first hill and reaches a speed of 10 m/s at the bottom of the hill. What is its speed when it is half-way down? Assume that the track is... more
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Ap Physics

07/10/17

Question is below please answer asap
A 500 kg roller coaster car crests a 20 m high hill at a speed of 10 m/s. It then rolls down the other side, all the way to ground level, and climbs a second hill. What is the speed of the car when... more
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Ap Physics

07/10/17

Question is below please answer asap
A pendulum, 2.0 m in length, is released with a push when the string is at an angle of 25° from the vertical. If the initial speed of the pendulum is 1.2 m/s, what is its speed at the bottom of the... more
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Ap Physics

07/09/17

Question is below b/c its length does not fit into the summary (please answer asap)
A 6.00 kg block slides down a 3.40 m long inclined plane. The speed of the block at the bottom is 5.40 m/s. If the height of the plane is 2.00 m, what is the work done by friction?   Im confused... more
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Ap Physics Physics Physics B

07/06/17

Physics problem - pleaseeeee need help!
I'm editing this problem because I was able to get a couple of the answers, but I still need help on the rest. An electromagnatic wave is traveling in vacuum with frequency 7 x 1014 Hz. The wave... more
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Ap Physics

06/30/17

A force of 250 N pushes a 50 kg box along a horizontal surface. The force is directed 30o below the horizontal. What is the acceleration of the box if the coeff
 Assume that g=9.8m/s^2
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Ap Physics

06/30/17

Question is below
A force of 250 N pushes a 50 kg box along a horizontal surface. The force is directed 30o below the horizontal. What is the acceleration of the box if the coefficient of kinetic friction between... more
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Ap Physics

06/30/17

Question is below please answer asap
A 500 N weight is hung at the middle of a rope attached to two buildings at the same level. The cable will break if the tension exceeds 1800 N, what is the minimum angle the rope can make with the... more
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Ap Physics

06/30/17

A stone is thrown horizontally from the top of a cliff. Ignoring air resistance, the forces acting on the stone during its flight are:
possible answers:   gravity alone gravity and the original force cannot be determined the original force alone
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Ap Physics

06/29/17

Mike stands on a scale in an elevator. If the elevator is accelerating upwards with 4.9 m/s2, the scale reading is ____ times Mike’s weight.
I know the correct answer is 1.5, but i am unsure as to how one arrives to the answer. Also what would the resulting acceleration be in this problem? 
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Ap Physics

06/23/17

A rock is thrown horizontally from a cliff with a speed of 15 m/s. It falls 1/2 of the cliff height in the last three seconds of its fall. Find free fall time.
Also find the find the cliff height and the horizontal distance from the cliff. 
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Ap Physics

06/23/17

a bullet is fired at an angle of 30 degres below the horizontal with an initial v of 800m/s from the top of a cliff 80m high. How far will it travel horizontly?
Sorry for the word errors. It will only allow so many characters. 
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06/09/17

Magnitudes of x,y,z components
Find the magnitudes of the x, y, and z components of the vector vector A shown in Figure 3-41, given that A = 75 m and θ = 56°.   http://www.webassign.net/walker/03-38alt.gif
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06/09/17

Vectors Question
A sailboat race course consists of four legs, defined by the displacement vectors A, B, C, and D, as the drawing indicates. The magnitudes of the first three vectors are A = 3.40 km, B = 5.10 km,... more
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Ap Physics Physics

06/09/17

Question on displacement vectors
A golfer, putting on a green, requires three strokes to "hole the ball." During the first putt, the ball rolls 5.0 m due east. For the second putt, the ball travels 2.1 m at an angle 20° north of... more
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Ap Physics Physics

02/16/17

Electric Potential
Part a is as follows: A long cylindrical insulator has a uniform charge density of 1.89 μC/m3 and a radius of 5 cm. What is the electric field inside the insulator at a distance of 4 cm? Answer in... more
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11/27/16

Physics: Work, Kinetic Energy, and Energy Lost to Friction
A 1.00-kg block is pushed along a rough horizontal floor with a horizontal force of 5.00 N for a distance of 5.00 m. If the block is moving at a constant velocity of 4.00 m/s, find... The work... more
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Ap Physics

10/21/16

What is the average value of the coefficient of kinetic friction between puck and ice?
A hockey puck is hit on a frozen lake and starts moving with a speed of 12.0 m/s. Five seconds later it's speed is 6.00 m/s. What is the average value of the coefficient of kinetic friction between... more
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Ap Physics

10/21/16

Find the coefficients of static and kinetic friction between crate and floor
 A dlock worker loading crates on a ship finds that a 20 kg crate, initially at rest on a horizontal surface requires a 75-N horizontal force to set it in motion. However, after the crate is in... more
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Ap Physics Physics

10/18/16

physics help
On May 20, 1999, Robbie Knieval easily cleared a narrow part of the grand canyon during a world record setting long distance motorcycle jump 69.5m. He left the jump ramp at 10 degrees angle above... more
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Ap Physics

10/17/16

calculate average acceleration of airplane during arrest
An airplane lands on an aircraft carrier and is brought to the ships velocity of 10.3 m/s by an arresting cable in a distance of 114 meters. The mass of the air plane is 28,000 kg and it's velocity... more
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Ap Physics

09/25/16

Kinematics physics determine the time
An airplane is recovered aboard an aircraft carrier with a steel cable that brings airplane from 69 m/s to the ship speed of 15.0 m/s over displacement of 81 m determine the time, in seconds, that... more
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09/25/16

What is the car's acceleration while braking?
A car accelerates uniformly from rest at 12.5 m/s^2 for 10 seconds. It then brakes to a rest over a distance of 1000 meters.
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