August 27August 27

AP physicsAP physics

In:In:A rock is dropped off a cliff and A rock is dropped off a cliff and

strikes the ground with an impact strikes the ground with an impact velocity of 30 m/s. How high was velocity of 30 m/s. How high was the cliff?the cliff?

a)a) 15 m15 m

b)b) 20 m20 m

c)c) 30 m30 m

d)d) 45 m45 m

e)e) 60 m60 m

Objective:Objective:

To begin our study of 2 To begin our study of 2 dimensional motion.dimensional motion.

Homework checkHomework check

2 dimensional motion2 dimensional motion

Must be solved using vectorsMust be solved using vectors Displacement vectorsDisplacement vectors Velocity vectorsVelocity vectors Acceleration vectorsAcceleration vectors Force vectorsForce vectors

Combining vectorsCombining vectors

Only the same type of vector can Only the same type of vector can be combined.be combined.

Components of vectorsComponents of vectors

Vector problem setVector problem set

Out:Out:

A sailboat is heading due A sailboat is heading due west at 10 m/s. The wind is west at 10 m/s. The wind is blowing at 5 m/s to the blowing at 5 m/s to the north. What is the actual north. What is the actual velocity of the boat?velocity of the boat?