Pod's Journey
Vocab
Key Concepts
True or false?
Scenarios
Crash
100
The purpose of the pod's thrusters is to:
reduce the speed of the pod and allow it to land at the station
100
to apply a force
exert
100
How an object changes velocity depends on the ______ of the force exerted on that object.
direction
100
Friction is a force between an object and the surface that goes the same direction as the moving object.
False
the force from friction goes in the opposite direction. this is what slows your hand down when you slide it across a surface.
100
A satellite crashed into two asteroids. Asteroid 1 has more mass and changed speed by 2km/s. Asteroid 2 has less mass and changed speed by 2km/s. Which crash caused a greater change in motion for the satellite?
Since it takes a stronger force to change the velocity of a more massive object, Asteroid 1 must have experienced a stronger force in the collision than the asteroid with less mass.
100
Who will experience a stronger force from the collision?
The person with less mass (32)
200
Thrusters help the pod land by exerting a force in the _______ direction as the motion of the pod.
oppsite
200
speed in a particular direction
velocity
200
if the same strength force is exerted on two objects but the object have different masses, the object with ____ mass will have a greater change in velocity.
less
200
A force is only a push that can change the motion of an object.
False
A force is a push or a pull that can change the motion of an object.
200
3 cars with the same mass are driving down California. The 3 are collide and bump in different directions. The red car's speed changed 1m/s, the green car's speed changed by 3m/s, and the blue car's speed changed by 2m/s. Which car experienced the strongest force when bumped?
The green car experienced the largest change in velocity and has equal mass with the other cars so it had the largest force.
200
When two objects collide, the article says both objects experience this same thing, even if their motions afterward differ.
The same force
Every collision produces equal forces on both objects, acting in opposite directions.
300
Mass of pod: 1,100kg
Mass of space station: 415,400kg
How does the evidence above support the claim that the pod is moving faster than the space station?
When the pod and station collided they experienced the same strength force but in opposite directions. The same strength force exerted on objects that of different mass will cause them to have different changes in velocity. The less massive pod will have a greater change in velocity than the extremely massive space station?
300
the moment when two objects hit each other
collision
300
When two objects collide, a force is exerted on each object. The two forces are exerted in ________ directions, but they are the _____ strength.
opposite
&
same
300
When an object is not moving, there must be no forces acting on it.
False
300
3 bikes move across a road. The gray and pink bikes have the same (larger) mass. The orange bike has less mass. After being bumped, each bike's speed increases by 2m/s. Which bike(s) experienced the strongest force when hit?
The gray and pink bikes since they are more massive and must have experienced the larger force.
300
In pool, if a moving cue ball strikes a stationary ball of the same mass in a straight line, this happens to the cue ball (according to the article).
The cue ball comes to a complete stop.
400
Draw a model that shows the forces exerted when the pod and station collided. Use arrows to show the strength of forces and indicate the mass of each object.
400
the amount of matter that makes up an object
mass
400
When 2 objects collide, a force is exerted on each object. The two forces are exerted in _______ directions, but they are the ______ strength.
opposite
and
same
400
The strength of a force affects how the velocity of the object changes.
True
400
3 scooters (all the same mass) are pushed on a smooth floor.
Scooter A's speed goes from 5m/s to 3m/s.
Scooter B's speed goes from 2m/s to 4m/s.
Scooter C's speed goes from 1m/s to 3m/s.
Which scooter(s) experienced the strongest force when pushed?
All 3 scooters experienced the same strength force because they changed speed by the same amount and have the same mass.
400
When two objects crash, both slow down or speed up depending on their velocity before the collision and this other property that affects how they respond.
Mass
Both mass and velocity determine how an object changes motion in a collision
500
2x points
The pod that did not land correctly (moved in the opposite direction) was more massive than previous pods. Since it was more massive, what can you infer about its velocity change given that the same strength thruster force was exerted?
It had a smaller change in velocity
500
a result or change that happens because of an event or process
effect
500
Even though the force exerted on each object in a collision is the same strength, if the objects have ______ masses, their changes in velocity will be different.
different
500
The velocity of an object can be determined by dividing the distance traveled by the time it took to travel that distance.
True
500
2x points
2 students were rolling a ball to collide with each other at recess. The tennis ball was the same mass while the pink soccer ball had more mass than the blue soccer ball. Which crash did the tennis ball experience a stronger force?
Crash 1; the force on the soccer ball was stronger in this crash, so the force on the tennis ball was also stronger. It takes a stronger force to change the velocity of a more massive object.
500
This term describes how fast something’s velocity changes during a collision — it’s what causes passengers to fly forward in a car crash.
acceleration