Name _____________________

Date ______________________

Quiz

Trig Review

What does cosine of an angle represent on the unit circle?

What does sine of an angle represent on the unit circle?

Kinematics Equations

d = v_i*t + ½ *a*t²

v_f = v_i + a*t

v_f² = v_i² + 2*a*d

d = (v_i + v_f)/2 *t

Describe what each variable defines in the kinematics equations

1. d __________________ v_f - _________________

v_i -__________________ t- __________________ a- ________________

Solve.

An engineer is designing the run-way for an airport. Of the planes which will use the airport, the lowest acceleration rate is likely to be 4 m/s². The takeoff speed for this plane will be 80 m/s. Assuming this minimum acceleration, what is the minimum allowed length for the run-way?

Use the parametric equations to solve the problem.

x = (v_o cos Ө) t

y = -16t² + (v_o sin Ө) t + so

A football is thrown into the air from a height of 6ft at an angle of 40° from the ground and with an initial velocity of 50 ft/s. Determine the parametric equations which model the flight of the ball.