Applying the Equations of Motion Physics 11 Equations of Motion.

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Presentation transcript:

Applying the Equations of Motion Physics 11

Equations of Motion

Sample Problem 1 The driver of a car, travelling at 1.00x10 2 km/h, sees a barrier that is 85.0m in front of them. If they are able to accelerate at -4.85m/s 2, determine the following: Will they hit the barrier? How far before the barrier will the car stop?

Sample Problem 1 t 0 =0s d 0 =0m v 0 =27.8m/s a=-4.85m/s 2 t 1 =? d=85.0m v=0 a=-4.85m/s 2 v 0 =27.8m/s

Sample Problem 2 A ball is dropped off a cliff of height 75.0m. Determine: The length of time until the ball hits the ground The speed at which the ball hits the ground

Sample Problem 2 t 0 =0s d 0 =0m v 0 =0m/s a=-9.81m/s 2

Sample Problem 3 An arrow is shot into the air at a speed of 25m/s. Determine: The length of time it is in the air The speed at which it hits the ground The maximum height it attains

Sample Problem 2 t 0 =0s d 0 =0m v 0 =25m/s a=-9.81m/s 2

Solve Together we will solve the second equation for acceleration, substitute it into the first equation and simplify Then you will solve the second equation for time, substitute it into the first equation and simplify