First Question:
Assume the acceleration due to gravity is -9.8m/s^2 and ignore air resistance. upward motion is POSITIVE direction
1.a) a stone is projected upwards from O with a speed of 20 m/s find the velocity of the stone after 4 s.
ok this is fairly easy so a=-9.8 u=20 t=4
v=u+at so...
A student performs an experiment in which an electric motor is used to lift a 200g weight through 2m, thus increasing its potential energy 4J. from measurements of the rate at which the weight is lifted the efficiency of the motor is to be determined. Two different voltages were used and the...
Homework Statement
a 100 kg trollley is being pushed up a rough 30degree incline by a constant force, F. the frictional force Ft between the incline and the trolley is 110N. determine the value of F that will move the trolley up the incline at a constant velocity of 5ms^1?
thanks my 1st...