2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 Motion Velocity Friction Acceleration Force.
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Transcript of 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 Motion Velocity Friction Acceleration Force.
True or False Two bicycle riders
have the same speed. Their velocity must also
be the same.
Velocity 1
Velocity 3
DAILY DOUBLE1. What is the equation for
calculating velocity?
2. What does each variable stand for?
Velocity 4
Amy swam 50 m downstream in 25 seconds. What was her
average velocity?
V = d/t = 50 m/ 25 s = 2 m/s
If Andy drives his dune buggy at an average velocity of 350 m/s how
long would it take him to go 5 km?
Velocity 5
Velocity 5
If Andy drives his dune buggy at an average velocity of 120 km/h how long would it take
him to go 5 km?
V=d/t so t = d/vConvert km to m 5 km = 5000 m
t = 5 km 120 km/h =0.042h= 60 min * 0.042 = 2.5 min
Acceleration 4
A sports car can accelerate from 0 to 60 in
6 seconds. If 60 mi/h is equal to 27 m/s, what is the sports car’s average
acceleration?
Acceleration 4
A sports car can accelerate from 0 to 60 in seconds. If 60 mi/h is equal to 27 m/s, what is the sports car’s average
acceleration?
a = vf – vi
t27 – 0 m/s
6 s = 4/5 m/s2
Acceleration 5
If a bicycle has an average acceleration of -0.44 m/s2 with and initial forward velocity of 8.2 m/s, how
long will it take to come to a stop?
Acceleration 5
If a bicycle has an average acceleration of -0.44 m/s2 with and initial forward
velocity of 8.2 m/s, how long will it take to come to a stop?
t = vf – vi
a t = 0 – 8.2 m/s -0.44 m/s2 = 18.63 s
Force 4
If the net force is unbalanced, the object will _________ in the direction of the net
force.
Force 4
If the net force is unbalanced, the
object will accelerate in the
direction of the net force.
______ _______is a force that
opposes motion between two moving
objects that are touching.
Friction 1
Kinetic friction is a force that
opposes motion between two moving
objects that are touching.
Friction 1
Friction 2
Which type of friction exerts the smallest opposing force on a
moving body?
Rolling friction
Friction 4
A sky diver uses a parachute to float to earth slowly and
safely. This is an example of what type of kinetic friction?
Friction 4
A sky diver uses a parachute to float to earth slowly and safely. This is an
example of what type of kinetic friction?
Fluid friction or air resistance
Friction 5
If the box is NOT moving down the ramp, what is the force of static
friction exerted on the box?