Spider-Man was trying to stop a moving train in the video. He had difficulty stopping the train due to its large mass and high velocity. The greater the mass and velocity of an object, the greater the momentum it has and the harder it is to stop.

2. SPIDEY IN ACTION

3. SPIDEY IN ACTION
STOP
DIFFICULTY
MOTION
What is Spider-Man doing in
the video?
Did he find it easy to stop
the train?
What do you think are the
reasons why he suffered
difficulty in stopping the
train?

4. STOP
DIFFICULTY
MOTION
SPIDEY IN ACTION

5. is a measure of how
difficult it is to stop a
moving object

6. Team A has the great
lead. The game’s
MOMENTUM is on their
team now.

7. FACTORS AFFECTING MOMENTUM
mass (m) velocity (v)
amount of matter in
an object
speed with direction

8. is a vector quantity
that follows the
direction of velocity
a.k.a “mass in
motion”

9. Did you know that . . .
the symbol used to represent
momentum is “p”.
p = petere

10. How does MASS affect MOMENTUM?
m1
p2
p1
m2

11. v1
p2
p1
v2
How does VELOCITY affect MOMENTUM?

12. MOMENTUM EQUATION
mass velocity momentum
m v p
kg m/s kg*m/s
In symbols
In SI units

13. A 360,000 kg passenger plane
lands on the runway with a
velocity of 1.5 m/s. Determine its
momentum.
Sample Problem

14. The parking brake of a 1200kg
automobile has been broken, and
the vehicle has reached a
momentum of 7800kg*m/s.
What is the velocity of the
vehicle?
Sample Problem

15. Sample Problem
A 325 kg motorcycle is moving at 38.89 m/s, east.
a. Find its momentum
b. At what velocity is the momentum of a 1754 kg car to
that of the motorcycle.

16. Why does knowing the momentum and the stopping distance
of vehicles important in driving safely?

17. In a baseball game, why
does the batter need to
swing back the bat
before hitting the ball?

18. IMPULSE
-change in momentum
- is the change of momentum of an
object when the object is acted upon
by a force for an interval of time

19. For us to change the momentum of an object (impulse), we
need to apply an amount of force (impact force) within a
specific amount of time (impact time).
FORCE TIME IMPULSE
F t I
N s N•s
In symbols
In SI units

20. IMPULSE =change in momentum
I= p
I= mv
I= m(vf-vi)

21. A hockey player applies an average force of 80.0 N
to a 0.25 kg hockey puck for a time of 0.10 seconds.
Determine the impulse experienced by the hockey
puck.
Sample Problem

22. Jennifer, who has a mass of 50.0 kg, is riding at 35.0 m/s in her red sports
car when she must suddenly slam on the brakes to avoid hitting a deer crossing
the road. She strikes the air bag that brings her body to a stop in 0.500 s.
What average force does the seat belt exert on her?
Sample Problem