A 45.0 kg student sits at rest on a new class rolling chair. A friend tosses the student a 5.0 kg backpack at 4m/s to the left. The student freaks out and bats the backpack away moving the student backwards across the class at a speed of 0.5 m/s to the left. What is the backpack's final velocity?
Question 9
9.
Question 10
10.
An astronaut at rest in space has a mass of 84 kg and fires a thruster that expels 0.035kg of hot gas at 875m/s to the right. What is the velocity of the astronaut after firing the thruster?
Question 11
11.
Question 12
12.
The cue ball and the 8 ball collide, both with a mass of 0.16kg. The cue ball moves with a velocity of 4m/s, and the 8 ball is at rest. After the collision, the cue ball comes to a complete stop. What is the velocity of the 8 ball after the collision?
Question 13
13.
Question 14
14.
A skydiver (54 kg) is coming in for a landing at a brisk speed of 13 m/s. An unknowing child (22 kg) is watching the landing before getting hit. The skydiver luckily scoops the child with minimal harm and now both are continuing to land. What is the final velocity of the skydiver and the child?
Question 15
15.
Question 16
16.
A 0.2 kg arrow is fired at 15.8 m/s towards a 15 kg target. The arrow hits the target and they move together. What velocity does the arrow and target move together?
Question 17
17.
Question 18
18.
Tinkerbell (0.08 kg) finds herself stuck in the keyhole of an open drawer (3.7 kg). She pushes against the drawer to free herself and eventually goes flying to the left at 36 m/s. How fast does the drawer move to the right?
Question 19
19.
Question 20
20.
A 24 kg toddler takes a running leap to jump on their 40 kg sibling's back. Once they land, both the siblings go forward at 2.3 m/s. What is the initial velocity of the toddler?
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
Create a "Rule of Thumb" to identify which object moves faster in an Explosion
Question 25
25.
Create a "Rule of Thumb" to identify when an object would keep moving forwards, move backwards, or stop after colliding during an Elastic Collision
Question 26
26.
Create a "Rule of Thumb" to identify how initial velocity relates to the final velocity during Inelastic Collisions
In which collisions is Momentum Conserved?
Explosions
Inelastic
Elastic
None
In which collisions is Kinetic Energy Conserved?
Explosions
Inelastic
Elastic
None
In which collision do the objects stick together after they collide?
Explosions
Inelastic
Elastic
None
In which collision do the objects always start at rest?
Explosions
Inelastic
Elastic
None
Which collisions have to have at least one object moving at the start?
Explosions
Inelastic
Elastic
None
True or False: An object's initial momentum must be the exact same as its final momentum to follow Conservation of Momentum.
True
False
A 45.0 kg student sits at rest on a new class rolling chair. A friend tosses the student a 5.0 kg backpack at 4m/s from the left. The student freaks out and bats the backpack away moving the student backwards across the class at a speed of 0.5 m/s to the left. What type of collision is this?
Explosion
Inelastic
Elastic
An astronaut at rest in space has a mass of 84 kg and fires a thruster that expels 0.035kg of hot gas at 875m/s to the right. What type of collision is this?
Explosion
Inelastic
Elastic
The cue ball and the 8 ball collide, both with a mass of 0.16kg. The cue ball moves with a velocity of 4m/s, and the 8 ball is at rest. After the collision, the cue ball comes to a complete stop. What type of collision is this?
Explosion
Inelastic
Elastic
A skydiver (54 kg) is coming in for a landing at a brisk speed of 13 m/s. An unknowing child (22 kg) is watching the landing before getting hit. The skydiver luckily scoops the child with minimal harm and now both are continuing to land. What type of collision is this?
Explosion
Inelastic
Elastic
A 0.2 kg arrow is fired at 15.8 m/s towards a 15 kg target. The arrow hits the target and they move together. What type of collision is this?
Explosion
Inelastic
Elastic
Tinkerbell (0.08 kg) finds herself stuck in the keyhole of an open drawer (3.7 kg). She pushes against the drawer to free herself and eventually goes flying to the left at 36 m/s. What type of collision is this?
Explosion
Inelastic
Elastic
A 24 kg toddler takes a running leap to jump on their 40 kg sibling's back. Once they land, both the siblings go forward at 2.3 m/s. What type of collision is this?
Explosion
Inelastic
Elastic
During an explosion if Object A has less mass than Object B, what would be the outcome?
Object A goes faster than B
Object A goes slower than B
Object A goes the same speed as B
What is true about the initial velocity of a moving object during an inelastic collision?
Vi > Vf
Vi < Vf
Vi = Vf
Cart A collides with a stationary Cart B. In the Elastic collision, Cart A bounces back towards where it started and Cart B moves forwards slightly. What must be true about the masses?