Physics Answers

A 5kg weight whose motion is constrained by vertically guides is dropped from rest 0.5m onto vertically aligned spring whose stiffness is 10kNm-¹. how fast is the weight travelling when the spring has been compressed by 50mm?

A cube of mass 10kg is at rest on a horizontal surface when it is subjected to a horizontal for P that varies with time t as P=20t. If the static and kinetic coefficients of friction are both 0.4, calculate the velocity of the cube after 5s.

A block is given an initial velocity of 5.00 m/s up a frictionless 20.0° incline. How far up the incline does the block slide before coming to rest?

Michael applies a 8 N rightward force to a 0.75 kg book to accelerate it across a table top. The coefficient of friction between the book and the tabletop is 0.610. Determine the acceleration of the book.

Determine the accelerations that result when a 20 N net force is applied to a 5 kg object and then to an 8 kg object.

A force of P N acting on a body of 5kg traveling with a velocity of 5ms^-1 increases it velocity to 10ms^-1. if the force acts in the direction of motion for a period of 5s, what is the value of P?

The displacement (in meters) of a particle executing simple harmonic motion at any instant of time is

given by, y = 0.2sin2π(350t − 0.30). Calculate i) the amplitude, ii) wave velocity, iii) wave length,

iv) frequency.

What will be the electric field experienced by a test charge if q = 7.03 x 10^-6 C from a source charge q = 12 x 10^-6 C in a vacuum when the test charge is placed 0.25 m away from the other charge? 

A 2.0kg mass fails 400cm.

(a) how much work was done on it by gravitational force?

(b) how much PEG did it lose?

(c) given that work is the transfer of energy where does that energy end up?

A 1200kg car going 30m/s applies its brakes and skids to rest. If the friction force between sliding tiresband pavement is 600N. How far does the car skids before coming tonrest.