197 Answered Questions for the topic 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

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

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

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? 

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. 

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

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

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

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

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

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

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

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

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

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

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.

09/25/16

Kinematics calculate acceleration

 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 calculate the acceleration required... more

09/09/16

Hard AP Physics Question (Meteorite hits car)

In 1992, a 14-kg meteorite struck a car in Peekskill, NY, leaving a 20-cm deep dent in the trunk.    (a) If the meteorite was moving at 500 m/s before striking the car, what was the magnitude of... more

09/09/16

Physics Hard question

Imagine that a sprinter accelerates from rest to a maximum speed of 10.8m/s in 1.8s. In what time interval will he finish the 100-m race if he keeps his speed constant at 10.8m/s for the last part... more

08/27/16

Two Rubber Ball Collision Physics Questions

A rubber ball is shot straight up from the ground with speed v0. Simultaneously, a second rubber ball at height h directly above the first ball is dropped from rest.   1. At what height above the... more

05/27/16

a linear spring is used in a physics lab. What's the slop of time verse mass?

A linear spring of spring constant K is used in a lab experiment. A block of mass m is attached to the spring and the resulting period T of the simple harmonic oscillations is measured. Blocks of... more

05/22/16

What happens to an unstable particle in an accelerator?

An unstable particle produced in an accelerator experiment travels at constant velocity, covering 1.00 m in 3.58 ns in the lab frame before changing ("decaying") into other particles.

05/07/16

A box of mass 44kg is pushed hard enough to set it in motion across a flat surface. The coefficient of kinetic friction between the box and the surface is .48.

The rest of the question is What minimum pushing force is needed to keep the box moving at a constant velocity?

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