Transcript clickers Mom_Imp rev

Momentum & Impulse
For clickers
Which statement(s) describe
momentum? (choose all that apply)
A.
B.
C.
D.
E.
the “umph” that keeps an object moving
“inertia in motion”
impulse
depends on mass and velocity
measured in Joules
Impulse can be described as…
A.
B.
C.
D.
E.
momentum
A force acting over a time interval
A force acting over a distance
work
None of these
The metric unit of momentum is
A.
B.
C.
D.
E.
Newton
Watt
Joule
Newton-second
Kg m/s
The metric unit of impulse is
A.
B.
C.
D.
E.
Newton
Watt
Joule
Newton-second
Kg m/s
Which of the following is true for a golf club
hitting a golf ball? (choose all that apply)
A. The impulse is the same for the club and the
ball.
B. The force on the ball is greater than the force
on the club.
C. The change in momentum of the ball is equal
to the change in momentum of the club.
D. The ball and the club have the same change
in velocity.
In a perfectly inelastic collision,
(choose all that apply)
A. momentum is conserved.
B. kinetic energy is conserved.
C. the objects stick together.
D. the objects bounce off each other.
In a perfectly elastic collision,
(choose all that apply)
A. momentum is conserved.
B. kinetic energy is conserved.
C. the objects stick together.
D. the objects bounce off each other.
A 5 kg bowling ball is given a momentum
of 15 kgm/s. What is its velocity?
A.
B.
C.
D.
E.
F.
0 m/s
3 m/s
5 m/s
15 m/s
75 m/s
None of these
A 5 kg bowling ball is given a momentum of
15 kgm/s. If it started from rest, how much
impulse was applied to the bowling ball?
A. 0 Ns
B. 3 Ns
C. 5 Ns
D. 15 Ns
E. 75 Ns
F. None of these
If car A is 500 kg traveling at 5 m/s hits car B, 250
kg moving in the opposite direction at 2 m/s, what
is the total momentum of the system before
collision?
A. 500 kgm/s
B. 2000 kgm/s
C. 2500 kgm/s
D. 3000 kgm/s
E. None of these
If car A is 500 kg traveling at 5 m/s hits car B, 250 kg
moving in the opposite direction at 2 m/s, assuming
the cars stick together upon collision, how fast will
they be going?
A. 0 m/s
B. 2.0 m/s
C. 2.7 m/s
D. 4.0 m/s
E. 8.0 m/s
A 100 kg cannonball is fired from a 1000 kg
cannon at a speed of 5 m/s. How much
momentum does the cannon have after firing?
A. 0 kgm/s
B. 500 kgm/s in the direction of the cannonball
C. 500 kgm/s opposite direction of the
cannonball
D. 5000 kgm/s in the direction of the
cannonball
E. 5000 kgm/s opposite direction of the
cannonball.
A 100 kg cannonball is fired from a 1000 kg
cannon at a speed of 5 m/s. What is the recoil
velocity of the cannon?
A. 0 m/s
B. 0.5 m/s in the direction of the cannonball
C. 0.5 m/s opposite direction of the
cannonball
D. 2 m/s in the direction of the cannonball
E. 2 m/s opposite direction of the cannonball.
A 20 kg bumper car moving to the right at 5.00 m/s
overtakes and collides with a 35 kg bumper car also moving
to the right. After the collision the 20 kg car slows to 1.4
m/s right and the 35 kg car moves at 4.0 m/s to the right.
Find the velocity of the 35 kg car before the collision?
A. 1.68 m/s
B. 1.94 m/s
C. 10.25 m/s
D. 33.33 m/s
[Default]
E.
None
of
these
[MC Any]
[MC All]