Mechanics | Relativity Answers

When talking a penalty kick, footballer applied a force of 30.0 N for a period of 0.05 s. Calculate the speed with which the ball moves off.

A uniform sphere of weight 200N is placed on a V- shaped wedge formed by to two flat frictionless surfaces what is the magnitude of the force exert on the sphere by each Force

resolve each of the following vector into components.

•F1=11×10⁴N at 33°to the positive x-axis

•F2=15 GN at 28° to the positive x-axis

•F3=11.3kN at 193° to the positive x-axis

•F4=125 ×10⁵ N at 317° to the positive x-axis

How far would a horse that rides at 7.7 m/s travel in 8.2 minutes?

as shown in fig. 5-14, the uniform, 1600-n beam is hinged at one end and held try a tic cope at the other

The angular position of a swinging door is described by θ(t)= (5.00+ 2.00t³) rad

Determine the angular position, angular speed, and angular acceleration of the door at t=3.0s.

The angular position of a swinging door is described by 0(t)= (5.00+ 2.00t³) rad

Determine the angular position, angular speed, and angular acceleration of the door at t=3.0s.

an inclined plane of angle 20, has a spring of force constant k=500 N/m, fastened securely at the bottom so that the spring is parallel to the surface,a block of mass m =2.50 kg is placed on the plane at a distance d=0.3m from the spring. From this position ,the block is projected downwards towards the spring with speed v=0.750 m/s. By what distance is the spring compressed when the block momentarily comes to rest ?

The vector position of a particle varies in time according to the expression r = 3i-6t^2 j.(a) find an expression of velocity of particle as a function of time (b) determine acceleration of particle as a function of time (c)calculate the position and velocity at t=1s

You can determine the index of

refraction of a substance by

determining its critical angle. (a) What

is the index of refraction of a

substance that has a critical angle of

68.4º when submerged in water?

What is the substance, based on Table

25.1? (b) What would the critical

angle be for this substance in air?