Mechanics | Relativity Answers

A vehicle of mass 705kg accelerates uniformly from rest to a velocity of 64kmh in 10s whilst ascending a 15% gradient. the frictional resistance to motion is 0.5kN. making use of D'Alemeberts principle, determine

(i) the tractive force effort between the wheels and the road surface.
(ii) the work done in ascending the slope
(iii) the average power developed by the engine

A lift cage of mass 540 kg accelerates upwards from rest to a velocity of 6 ms−1 whilst travelling a distance of 13m. The frictional resistance to motion is 220 N. Making use of the principle of conservation of energy, determine:
i) the work done
ii) the tension in the lifting cable
iii) the maximum power developed

A space vehicle travelling at a velocity of 1200m/s separates by a controlled explosion into two sections of mass 855 kg and 240 kg. The two parts carry on in the same direction with the heavier rear section moving 120 m/s slower than the lighter front section. Determine the velocity of each section after separation.

A 60.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 3.70 m. What is the work done on the man by (a) the gravitational force and (b) the escalator?

a ball rolls offf the top of a step ladder with a horizontal velocity of 10m/s if the steps are 1m high and 1m wide the ball will just hit a03rd step b)20th step c)12th step d) 10th step

A 197-kg crate is pushed horizontally with a force of 702 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.

An air bubble of 1cm radius is rising at a steady rate of 2mm /sec through a liquid of density 1.5 gm per cm cube neglect density of air , if g is 1000 cm /sec square , then the coffecient of viscosity of the liquid is ????????????????????????????????

If the terminal speed of spere of gold density = 19.5 kg /m cube is 0.2 m/s in a viscous liquid density = 1.5 kg / m cbe , find the terminal speed of a spere of silver (density = 10.5 kg /m cube ) of the same size in same liquid .

At what speed , the velocity head of water is equal to pressure head of 40 cm of mercury .??????????????????????????????????????????

Two water pipes p and q having diameter 2 into 10 raise to power -2 and 4 into 10 raise to power -2 respectively are joined in series with the main supply line of water .the velocity of water flowing in pipe p is ???????????????????????????????????