Show:
Velocity and Acceleration
Forces and Frrrriction!
Thank you, Newton!
Simple Machines, Work and more!
Power and Energy
100
A clown fish swims 18 meters west towards a sea anemone in 2.5 seconds. What is the clown fish's velocity?
7.2 m/s west (V=18m/2.5s)
100
A bus pulls into the Little Wound parking lot. What type of friction is in play here?
Rolling Friction
100
Which of Newton's Laws of Motion is this: For every action there is an equal and opposite reaction.
Newton's 3rd Law of Motion (Balanced Forces)
100
Which of the following is the WEAKEST universal force? - Weak Nuclear Forces - Strong Nuclear Forces - Gravitational Forces - Electromagnetic Forces
Gravitational Forces
100
How much power does it take to do 60J of work in 15s?
4Watts (P=60J/15s)
200
A snail crawls 0.025m/s for 15 seconds to outrun a bird. How far does it crawl?
0.0625 meters (D=0.025m/s x 15s)
200
Today I tried to push a car out of a snow bank with all my might, but it just wouldn't budge. What kind of friction prevents me from moving the car?
Static Friction
200
Which of Newton's Laws of Motion is this: The change in motion of an object depends on the size of the force and the mass of the object.
Newton's 2nd Law of Motion (F=MxA)
200
What is the difference between weight and mass?
Mass is the amount of matter in an object, while weight is the force of gravity on an object.
200
How much power is produces by a person who weighs 600N climbing a 6m ladder in 9 seconds?
400W (P=600Nx6m/9s)
300
A man faints after seeing blood. If he falls down 2.2 meters at a velocity of 11 m/s, how long did it take him to fall?
0.2 seconds (T=2.2m / 11m/s)
300
During the first game of LNI, Michael Jordan makes a comeback appearance and gets in a fight for the ball. Marcus pulls with 20N of force left, while Michael, in his old age, only pulls with 12N of force right. What is the net force on the ball and who wins it?
8N right, Marcus wins!
300
Which of Newton's Laws of Motion explains this scenario: Pushing a child on a swing is easier than pushing an adult on the same swing because the adult has more inertia.
Newton's 2nd Law of Motion (F=MxA)
300
What type of simple machine is a: 1. Toothpaste cap 2. Tweezers 3. Human arm 4. Knife
1. Screw 2. Lever 3. Lever 4. Wedge
300
A 2kg basketball gets stuck between the backboard and the rim during a basketball game. The ball is 3m from the ground. What is the basketball's potential energy?
58.8J (PE=2kg x 9.8m/s2 x 3m)
400
A helicopter's velocity increases from 25m/s to 60m/s in 5 seconds. What is the acceleration of the helicopter?
7 m/s2 (A = (60m/s - 25m/s)/5s)
400
Duane and Jeremiah toss a tennis ball across the room to each other. What kind of friction is in play?
Fluid Friction
400
Which of Newton's Laws of Motion explains this scenario: A magician pulls a tablecloth out from under dishes and glasses on a table without disturbing them.
Newton's 1st Law of Motion (Inertia): an object at rest stays at rest, and an object in motion stays in motion with the same speed and direction, unless acted upon by an unbalanced force.
400
How much work do you do when you push Yao Ming 4 meters with 10N of force?
40J (W=10Nx4m)
400
A 2kg basketball falls from the hoop with a velocity of 6 m/s. What is the ball's kinetic energy?
36J (KE=0.5 x 2kg x 6m/s x 6m/s)
500
While traveling up a hill, LeBron James slows from 45 m/s down to 10 m/s in 7 seconds. What is LeBron's acceleration?
-5 m/s2 (A= (10m/s-45m/s)/7s)
500
While driving a car on an icy road, President Obama slams on the break to avoid hitting a deer, but his car keeps moving across the ice. What type of friction is this?
Sliding Friction
500
How much force is required to move Godzilla, whose mass is 500 kg with an acceleration of 20 m/s2?
10000 N (F=500kg x 20m/s2)
500
When using a machine, which of the following would you prefer and WHY? a. The input force is greater than the output force. b. The output force is greater than the input force. c. The input force is equal to the output force.
b - I would want the output force to be greater than the input force because this means I only have to put in a small amount of force, and the machine exerts a greater force and does the same amount of work. More bang for your buck!
500
Which will have more potential energy: a. A 10kg cat stuck in a tree 8 meters above the ground. b. A 15 kg cat stuck in a tree 6 meters above the ground.
b. PE = 882J (PE=15kg x 9.8m/s2 x 6m) (a. PE = 784J)