Momentum & Rotational Motion

Quiz
•
Chemistry
•
12th Grade
•
Hard
+2
Standards-aligned
Emily Edlund
Used 1+ times
FREE Resource
12 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
As shown in the diagrams below, a lump of clay travels horizontally to the right toward a block at rest on a frictionless surface. Upon collision, the clay and the block stick together and move to the right. Compared to the total momentum of the clay and the block before the collision, the momentum of the clay-block system after the collision is:
can't be determined
greater
less
the same
Tags
NGSS.HS-PS2-2
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If a 50-kg box is sliding on a frictionless surface with a certain velocity, and 10 pigeons land on it, what happens to the velocity of the box?
increases
decreases
stays the same
impossible to tell
Tags
NGSS.HS-PS2-1
NGSS.HS-PS2-2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A net force of 200 N acts on a 100-kg boulder, and a force of the same magnitude acts on a 130-g pebble for the same amount of time. How does the rate of change of the boulder's momentum compare to the rate of change of the pebble's momentum?
greater than
less than
equal to
Tags
NGSS.HS-PS2-1
NGSS.HS-PS2-2
4.
MULTIPLE SELECT QUESTION
1 min • 1 pt
A propeller with radius r rotates with constant angular velocity. What happens to its tangential velocity & tangential acceleration if the radius & velocity are doubled?
Both tangential velocity and tangential acceleration doubled.
The tangential velocity is doubled while tangential acceleration remains the same.
Both tangential velocity and tangential acceleration are quadrupled.
The tangential velocity is quadrupled while the tangential acceleration remains the same.
5.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Children are playing in a roundabout and they want to spin faster. Assume no external forces are applied, what could be done to make it rotate faster?
Add more children at the edge of the roundabout.
Have all of them sit instead of standing up.
Have children with larger weights move to the center of the roundabout.
Add more children to the center of the roundabout.
Tags
NGSS.HS-PS2-1
6.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
A 5500-kg freight truck accelerates from 4.2 m/s to 7.8 m/s in 15 seconds by the application of a constant force. A) What impulse is experienced? B) How large of a force is exerted?
Answer explanation
A)
J = Δp
J = (5500)(7.8) - (5500)(4.2)
J = 19,800 kg*m/s
B)
J = Ft
19,800 = F(15)
F = 1320 N
Tags
NGSS.HS-PS2-1
7.
FILL IN THE BLANK QUESTION
5 mins • 1 pt
A 0.045-kg golf ball is dropped from a height of 1.8 m and comes back up at a height of 1.2 m. A) What is the velocity of the ball right before it hits the ground? B) What is the rebound velocity? C) What impulse did the ball experience?
Answer explanation
A)
Potential Energy = Kinetic Energy
U = KE or PE = KE
(0.045)(9.8)(-1.8) = 1/2(0.045)v^2
v = -5.94 m/s
B)
KE = U or KE = PE
1/2 (0.45)v^2 = (0.045)(9.8)(1.2)
v = 4.85 m/s
C)
J = Δp
J = (0.045)(4.85)-(0.045)(-5.94)
J = 0.49 kg*m/s
Tags
NGSS.HS-PS2-1
NGSS.HS-PS2-2
NGSS.HS-PS3-1
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