Motion Vocab
Unit of time
seconds
What is the speed of a ball that rolled 3 meters in 5 seconds? (WITH UNIT)
0.6m/s
3m/5s=0.6m/s
Shows a person staying in the same position.
Position/displacement graph (position/distance VS time).
Equation for force (including units).
F (newtons) = M (kg) * A (m/s2)
Draw a FBD showing 30 N of sliding friction.
30 n arrow backwards
distance from an origin point
displacement
How far did a man run if he ran .05m/s for 20minutes? (WITH UNIT)
0.05 m/s * 1200 sec = 60m
Draw and label a graph showing steady acceleration (include axis labels).
Speed vs time with positive slope
What is the momentum of a .3kg baseball thrown at 25 m/s?
0.3kg * 25m/s = 7.5kg m/s
Draw a FBD that shows an apple falling with 20 n of Fg and 10 n of Fair
unit of acceleration
m/s2
How much time did it take for a bird to fly 300 m if he was traveling at 0.5m/s? (WITH UNIT)
300m / 0.5m/s = 600s (10 min)
Draw and label a graph that shows a car speeding up, slowing down, and then going a steady speed. (Include axis labels)
Speed vs time graph, positive slope, negative slope, then horizontal
What is the equation for momentum?
p = m * v
The force that opposes gravity
normal force
how much mass with how much velocity
momentum
What is the acceleration of a dog that started running 3m/s and after 3 minutes was running 6m/s? (WITH UNIT)
(6m/s-3m/s)/180s = 0.017m/s2
Draw and label a graph showing a person walking away from their house, sitting at a park, and then walking back.
Position/time graph, positive slope, horizontal line, negative slope
2 boys swing baseball bats at the same time. Boy A's 0.05 kg bat is moving at 18m/s. The bats are going to collide. If all the momentum for Boy A's bat goes to Boy B's on impact, what is the initial velocity of Boy B's 0.07kg bat after impact?
(0.05 kg * 18m/s) = 0.07 kg * Xm/s
0.9 = 0.07 * X
0.9/0.07= 12.86 m/s
Kinds of friction (4)
static friction, sliding friction, rolling friction, fluid friction
how much mass with how much acceleration
force
What was the acceleration of a semi that has a mass of 5000kg and a force of 400 newtons? (WITH UNIT)
400n / 5000kg = 0.08 m/s2
List 3 things you can learn from a displacement graph.
distance, speed, displacement
Which has more force, a 200 kg bear moving at 30m/s2 or a 100 kg person moving at 60m/s2?
They have equal force.
200*30 = 6000 newtons
100*60= 6000 newtons
Draw a FBD showing a car traveling west at a constant speed.
- normal force (same as G)
-friction (air and road)
-gravity (same as G)
-rolling (longest