Mechanics | Relativity Answers

Water is flowing in a hose with a velocity of 1.5 m/s and a pressure of 3 kPa. At

    the nozzle the pressure decreases to atmospheric pressure (101300 Pa), there

    is no change in height. Use the Bernoulli equation to calculate the velocity of the

   water exiting the nozzle. The density of water is 1000 kg/m3 and gravity g is 9.8 

    m/s2.

2. A car travels form rest and has a constant acceleration of 3 ft/s^2. Find the average velocity during the first 10s of motion.

A machine part is undergoing SHM with a frequency of 5.00 Hz and amplitude 1.80 cm.

How long does it take the part to go from x=0 to x=-1.80 cm

A car is moving in rest with an acceleration of 2 ms-2 and reached to 20ms-1. Find the time taken?

A car and driver, with a total mass of 1350kg, moving at 30m/s on a horizontal road when the driver sees roadworks ahead. She brakes, decelerating with a constant force of 600N until arriving at the roadworks. Find the time elapsed before arriving at the roadworks.

A vehicle of mass 1,5Mg on brake test , traveling at 90km/h has the brakes applied to produce maximum braking.The coefficient of friction between the tyres and road is 0,8.Calculate the breaking force applied to the vehicle?

a particle moves in a straight line from O with initial velocity 5m/s . its acceleration ts later is (4-2t) m/s. calculate its final velocity

Four forces act on an object such that the object is at rest. Three of the forces are given by F₁ = 21-2j, F₂=i-4j, F4 = −3i-5j. Determine F3 and its magnitude.

A student does 1.6 104J of work. In the process, his internal energy decreases by 4.23 104 J. Determine a) W b) DU c) Q

a stone thrown from the top of the building is given initial velocity off 20m/s streight upwards, the stone is launched 50m above the ground and the stone just misses the edge of the roof on its way down using ta = 0