Unit Three Test Review Good Luck!. Sketch a motion map of object A x t A B.

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Presentation transcript:

Unit Three Test Review Good Luck!

Sketch a motion map of object A x t A B

Which object has a greater displacement at 3 seconds? x t A B 3 s Both objects have the same displacement.

Which object has a greater acceleration and why? x t A B 3 s Object A because it has a changing velocity.

A car starts from rest and accelerates to 15 m/sec over a time of 10 seconds. Make a motion map!

A car starts from rest and accelerates to 15 m/sec over a time of 10 seconds. Draw the velocity vs time graph! v t

A car starts from rest and accelerates to 15 m/sec over a time of 10 seconds. Calculation the acceleration v t Acceleration = 1.5 m/s/s

A car starts from rest and accelerates to 15 m/sec over a time of 10 seconds. How far does the car travel? v t Displacement = 75 m

A train traveling at 30 m/sec slows to 10 m/sec in 10 seconds. It then travels at that speed for another 20 seconds. Make velocity vs. time graph for the motion t (sec) v (m/s) 30

What is the acceleration of the train while it is slowing down? t (sec) v (m/s) 30

What is the displacement of the train during the 30 seconds it is in motion t (sec) v (m/s) 30 Δx = Area = 400 m

A train going 25 m/sec slams on its breaks and comes to a stop in 87 seconds. What is the acceleration of the train? a = m/s/s

A train going 25 m/sec slams on its breaks and comes to a stop in 87 seconds. How far does it travel when coming to a stop? x = m

An arrow is fired up with an initial velocity of 18 m/sec. What is the acceleration at the highest point? a = -9.8 m/s/s

An arrow is fired up with an initial velocity of 18 m/sec. How high does the arrow fly? Xf = 16.5 m

An arrow is fired up with an initial velocity of 18 m/sec. What is the total time the arrow is in the air. t = 3.68 sec