An 8 kg block ,P is being pulled by constant force F up a rough inclined plane at an angle of 30 degrees to the horizontal, at constant speed. force F is parallel to the inclined plane. . draw a labelled free body diagram for block P. the kinetic frictional force between the block and the surface of the plane is 20,37N .calculate the magnitude of force F? . force F is now removed and the block accelerates down the plane. the kinetic fictional force remains 20,37N. calculate the magnitude of acceleration of the block ?​

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same