The volcano appeared to be ejecting material to a height of 2.00x10 given the acceleration due to gravity is 1.8 m/s find the initial velocity

Calculus

Use a (t) = - 32 ft/sec2 as the acceleration due to gravity. (Neglect air resistance.) A ball is thrown vertically upward from a height of 4 feet with an initial velocity of 79 feet per second. How high will the ball go? Round your answer to two decimal places.

physics

A block is at rest on the incline shown in the figure. The coefficients of static and kinetic friction are us=0.84 and uk=0.71, respectively. The acceleration of gravity is 9.8 m/s^2. What is the frictional force acting on the 29 kg mass? Answer in units of N.