New Speedway Boogie
I Fought the Law
Center of Gravity
Squarepusher
Even Flow
100
Let's just say that the pig is traveling at 2 m/s. While baby monkey is riding backwards on the pig, what is its resultant velocity?
Since the velocity of the monkey is 0 m/s and the pigs velocity is 2m/s, then the resultant velocity of the monkey riding backwards on the pig is 2m/s.
100
What is inertia?
It is the tendency for an object to resist a change in motion.
100
How is weight related to gravitational force?
Weight is a measurement of gravitational force.
100
What is friction and when does it occur?
Friction is a force that opposes the motion of an object. It occurs when two surfaces are in contact with each other.
100
Why do we need oxygen masks on the airplane in case of an emergency?
The atmospheric pressure is low at high elevations. The oxygen masks are there in case there is a loss of cabin pressure.
200
Is anyone in this picture accelerating? How can you tell?If they are changing speed or direction, they are accelerating.
200
Given the same amount of force, which will accelerate more: an empty shopping cart, or a shopping cart full of watermelons? Why?
The empty shopping will accelerate more because it has less mass.
200
True or false:
Pirate Tiff is attracted to this gorilla (gravitationally speaking).
Please explain.Yes, in fact they are both attracted to each other, because according to Galileo, all objects with mass exert a gravitational force of attraction to each other.
200
Calculate the Net force in each of these situations:
A: O N
B: 5 N to the left
C: O N
D: 15N upwards
200
Where is water pressure greater, at a depth of 1 m in a large lake or at a depth of 2m in a small pond? Please explain.
The size of a container (lake vs. pond) does not have an effect on pressure. However, the depth does because as you increase the depth, the pressure is also increased. There would be more water pressure at 2m in a small pond.
300
An llama's acceleration is 2 mi/h/s. What does this mean?
The llama is going 2 mi/h faster every second.
300
What would we expect to happen in this picture and why?
The skaters will push away from each other because they are each applying a force to each other.
300
Why is this water making a curved path? What is this motion called?
This is because there are a combination of forces acting up it. At first, the water is being pushed upwards and horizontally. This creates an upwards curve. When the water falls down, it is getting pulled downward by gravity and horizontal force from the faucet. This is called projectile motion.
300
What are two ways to increase the acceleration of this elephant?
You could decrease the mass of the elephant by asking it to not eat as much. You could get someone to help so that the amount of force could be increased. You could also change the amount of friction between the ground and the elephant by putting roller skates on the elephant.
300
Please explain the relationship between the weight on an object and the buoyant force on the object in determining whether an object will float, sink, or be pushed up?
Weight of an object > buoyant force== sinks
Weight of an object = buoyant force ==floats
Weight of an object < buoyant force == buoyed up
400
What kind of force causes acceleration?
Unbalanced forces.
400
Why are airbags in cars important?
Because if the car were to suddenly stop, your body would continue in moving until an unbalanced force acted on it. In this case, it's better to have an airbag push on your face than the windshield.
400
Explain terminal velocity in terms of this flying squirrel.
The squirrel will reach terminal velocity when the force of gravity acting on the squirrel is equal to the force of air resistance. At this point, the squirrel will continue to fall, but at constant velocity.
400
I've been told that if I want to lose weight, I can just go to Mars? Is this true? Please explain.
It is true that when you go to Mars, your weight will be less because there is less gravitational force exerted on you. However, if no mass is gained or lost, you will return your normal weight when you come back to Earth.
400
Why does it take significant force to push a beach ball underwater?
The beach ball doesn't weight a lot, so it doesn't have a lot of buoyant force on it. However, as you push it down, it displaces more water, which increases the buoyant force on it.
For example:
If you pushed a large beach ball completely underwater, it would displace a volume of water that would weight about 294 newtons. If the beach ball weighs only 4 newtons, you need to push down with at least 290 newtons (about
65 pounds) of your weight to get the ball underwater!