Mechanics | Relativity Answers

A stone of mass 50kg released from a heigth of 2m above the ground level if the stone falls freely to a heigth of 5m above the ground, its velocity is?

Describe the effect of the suface area of contact on the size of the friction force

A body of mass 3kg and volume 4×10^-4m^3 is hung from balance graduated in newtons. What is the reading of the balance when the body is;
a. In air
b. Fully immersed in water
c. ⅓ immersed in water
d. Fully immersed in paraffin.(Density of water is 10^3kgn^-3 and Density of paraffin is 800kgm^-3)

What is the upthrust on a body which displaces
0.6m^3 of water, 0.5m^3 of methylated spirit?
(density of water = 10^3 kgm^-3, density of
methylated spirit = 0.8 x 10^3 kgm^-3 and
g = 10ms^-2)

Lucy Lightfoot stands with one foot on one bathroom scale and her other foot on a second bathroom scale. Each scale reads 325 N. What was Lucy's weight?

Two seconds after you begin observing a swinging pendulum , the tip of the pendulum is at its rightmost position of 5m from center. Three seconds after that, it is at its leftmost position (5m from center) Determine an equation that models the horizontal position over time.

A car travelling at 80km/h gets a stone caught in one of its tires. Determine an equation that models the height of the stone over time if the radius is 25cm.

a pendulum which starts oscillation from the extreme position. A suppose that a bob is released from rest. determine the speed of the pendulum when passes position B and C. suppose that the length os the string OA is 1m and that the distance between point A and horizontal black line is 0.7m

A worker lift up of 3.5kg to height of 1.80m each 3seconds find the work done in one hour

If a force acts on an object only to accelerate it what is true about the equations: w=Fs and Ek =1/2mv^2-1/2mu^2