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Mechanics | Relativity
An electric motor operates at 1800rpm.Find its angular speed in radians/second.What is the linear spped of a point 55 mm from the axis of rotation?What is its centripetal acceleration
Mechanics | Relativity
a ball is horizontally from the top of a building 55 m high strikes the ground at point 35 m from the building .
a.find the time to reach the ground
b.find the initial speed of the ball
c.find the velocity with which the ball strike from the ground
a.find the time to reach the ground
b.find the initial speed of the ball
c.find the velocity with which the ball strike from the ground
Mechanics | Relativity
The three-toed sloth is the slowest moving land mammal. On the ground, the sloth moves at an average speed of 0.038 m/s, considerably slower than the giant tortoise, which walks at 0.078 m/s. After 10 minutes of walking, how much further would the tortoise have gone relative to the sloth?
Mechanics | Relativity
a travels from rest with acceleration 8 metre per second square.Find its velocity when it has covered a distance of 100metre
Mechanics | Relativity
A car traveling in a straight line has a velocity of +4.5 m/s. After 5.0 s, its velocity is +7.0 m/s. What is the car's average acceleration in this time interval?
Mechanics | Relativity
Runner A is initially 4.0 km west of a flagpole and is running with a constant velocity of 7.5 km/h due east. Runner B is initially 2.0 km east of the flagpole and is running with a constant velocity of 5.5 km/h due west. How far are the runners from the flagpole when their paths cross?
Mechanics | Relativity
You know how you close your eyes when you sneeze? Suppose you are driving along at a constant 99.9 km/h (i.e., 62 mi/h) and you experience a 1.00 s long, eyes-closed, giant sneeze. How many meters does the car travel while you are out of control?
Mechanics | Relativity
what would happen if all friction suddenly disappers
Mechanics | Relativity
when brakes are applied the speed of a train decreases from 96 kmh to 48 kmh in 800m. how much further wil the train moves before coming to rest?
Mechanics | Relativity
on a calm a boat can go across a lake and return in time T0 (knot) at a speed V. on a rough day there is a uniform current at speed v to help the onward journey and impede the return journey. if the time taken to go across and return on the rough day be T, then T/T0 will be ?
