An 86kg student is sitting on a high tech rolling chair whose wheels are so well manufactured that friction is almost non-existent. She has been challenged by her friends to move towards the white board without using her feet. The only thing she has is her 27kg backpack that she is able to throw at 6 m/s.
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Two students are conducting a Collisions Simulation in which the carts begin together. Consider this scenario after the carts are pushed away from each other.
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Question 11
11.
Question 12
12.
A student is sitting on a stationary cart that rolls with very little effort when a heavy backpack is thrown at the student, who then catches the backpack.
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Question 14
14.
Draggable item
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Corresponding Item
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Question 15
15.
Using the physics of motion, explain why seat belts are required by law.
Question 16
16.
A 0.08kg arrow is shot, without any arc in its trajectory, from a high force bow at a stationary 2.1kg hay target. The forces of the arrow embed it in the target and push them back at 4.1m/s. Assuming there is no friction, what is the initial speed of the arrow prior to hitting the target?
Question 17
17.
Weekly Check in: How was your week? Any celebrations? What concept did you struggle with? Any favorite songs with artist name?
Select the type of collision in which momentum is conserved.
Explosive Collisions
Elastic Collisions
Inelastic Collisions
Select the type of collision in which kinetic energy is conserved.
Inelastic Collisions
Elastic Collisions
Explosive Collisions
Select the type of collision both objects always have the same final velocity.
Inelastic Collisions
Elastic Collisions
Explosive Collisions
What must all moving objects have?
Momentum but not kinetic energy
Kinetic energy but no momentum
Both kinetic energy and momentum
Neither kinetic energy nor momentum
A 4kg seagull flies at 18m/s and lands on a 9kg piece of stationary driftwood. What is the velocity of the seagull and driftwood together while they are moving?
2 m/s
5.5 m/s
6.2 m/s
2.25 m/s
Calculate the velocity of a tractor that is 3200kg and utilizes 4200 kgm/s of momentum?
13,440,000 m/s
7,400 m/s
0.76 m/s
1.3 m/s
What is the impulse experienced on a ball by a bat with 23N of force for 0.008 seconds?
22.99 kgm/s
0.184 kgm/s
0.00034 kgm/s
2875 kgm/s
Question 8
8.
Question 9
9.
Question 10
10.
As a 2,300kg truck speeds up from 46m/s to 68m/s, what is the impulse on the truck?
7,194,400 Ns
50,600 Ns
22 Ns
104.5 Ns
How much force is exerted on a skater when a 102kg hockey player misses a check and hits the boards at 12m/s taking 0.2 seconds to stop?
1.7 N
1440 N
6120 N
244 N
Question 13
13.
Match the scenario with the correct assumption.
A red cart collides with a purple cart which is at rest. The purple cart moves forward while the red moves backward.
The mass of the red cart and the purple cart must be equal
A red cart collides with a purple cart which is at rest. The purple cart moves forward while the red cart also moves forward, but at a slower speed than the purple cart.
The mass of the purple cart must be greater than the mass of red cart
A red cart collides with a purple cart which is at rest. The purple cart moves forward while the red cart comes to a complete stop.
The mass of the red cart must be greater than the mass of purple cart
What will be her velocity after she throws the backpack?
0.05 m/s
1.9 m/s
76 m/s
248 m/s
What direction should she throw her backpack?
Towards the board
Away from the board
At a right angle to the board
It doesn't matter which direction as long as she throws it
Check all that apply.
Both carts have the same velocity as they move away from each other.
Total momentum is conserved.
Individual momentums are equal in magnitude and opposite in direction.