Kinematics

Kinematics is the study of

How fast are you going now, is asking

• what is the initial velocity

• what is the distance

• what is the time

• what is the acceleration

• what is the final velocity

Acceleration is defined as

• a change in time

• a change in displacement

• a change in velocity

• none of the above

Identify the given for the scenario: A rock is falling downwards at 12.0 m/s. After 2.0 seconds it is falling at downwards at 31.6 m/s. What was its acceleration?

Solve the problem using the kinematics formulas. An NFL caliber wide receiver can reach a top speed of 10.0 m/s in only 2.4 s. What is their acceleration during this time?

Solve the problem: An airplane accelerates down a runway at 5.20 m/s2 for 32.8 s until it finally lifts off the ground. Determine the distance traveled before takeoff.

Identify the equation needed to solve the problem. A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of the rifle, the bullet moves a distance of 0.740 m. Determine the acceleration of the bullet (assume a uniform acceleration).

• vf=vi+at

• d=vit+at²/2

• vf²=vi²+2ad