A car of mass 1200 kg accelerates from rest to a speed of 8.0ms in a time of 2.0s. a) Calculate the forward driving force acting on the car while it is accelerating.

b) At high speeds, the resistive frictional force F produced by the air on a body moving with velocity V is given by the equation F=bv^2 where b is a constant.

i) Derive the base units of force in the SI system.

ii) Determine the base units of b in the SI system.

iii) The car continues with the same forward driving force and accelerates until it reaches a top speed of 50 ms. At the speed, the resistive force is given by the equation F= bv^2. Determine the value of b for the car.

Atank holds 1000 gallons of water, which drains from the bottom of the tank in half an hour. the values in the table show the volume v of water remaining in the tank (in gallons) after t minutes.t(min) 5 10 15 20 25 30v(gal) 694 444 250 111 28 0(a) if p is the point (15, 250) on the graph of v, find the slopes of the secant lines pq when q is the point on the graph with t = 5, 10, 20, 25, and 30.(b) estimate the slope of the tangent line at p by averaging the slopes of two secant lines.(c) use a graph of the function to estimate the slope of the tangent line at p. (this slope represents the rate at which the water is flowing from the tank after 15 minutes.)show all steps.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

The human body stores chemical energy from digested food. some of the chemical energy is converted into mechanical energy when the body moves. which statement best supported by this information