Forces
Kinematics
???
Pi
Pressure
100
A force is this type of measurement
What is a Vector?
100
If I am running at 8m/s then come to a stop within 2 seconds, what is my acceleration?
What is -4m/s2?
100
What is the time interval of which the speed is decreasing?
What is 5:15 - 6:00
100
This part of an airplane, essential for maintaining lift, can be approximated as a circular arc. To find the circumference of a wing's arc with a radius of 5 feet, you would use this mathematical constant.
What is Pi (π)
100
Formula for hydrostatic pressure
What is P= pgh?
200
A swimmer pushes water backwards with her hands. According to Newton's Third Law, what is the force that propels her forward?
What is the force of the water pushing forward on her hands?
200
If I am walking at 5m/s then come to a stop within2 seconds, what is my acceleration?
What is -2.5m/s2?
200
True or False
Average speed is defined as the time it takes for a trip divided by the distance.
What is FALSE?
200
Fractional representation of Pi
What is 22/7?
What is 355/113?
200
This variable represents what?
What is DENSITY?
300
A plane accelerates at 12m/s2 at an altitude of 3000m. Which forces are not equal with the rest?
What are thrust & drag?
300
Describe the scalar quantity measured by this graph
What is constant speed?
300
An object with a density of 20kg/m3 has a volume of 5m3. This object slides with an acceleration of 4m/s2. What is the force generated by this object?
(HINT: Density = Mass/Volume)
What is 400N?
D=m/v --> m=D*v --> m=20*5 = 100
F=ma --> F= 100 * 4 = 400N
300
For any circular object, Pi can be approximated by using this formula
What is C/d?
300
According to Charles' Law, if a sealed balloon is placed in hot water, what changes can we see with the balloon?
What is increased volume? (due to change in temperature)
400
In space, where there is very little friction, what would happen to a spacecraft if no external forces acted upon it?
What is it would continue moving in a straight line at a constant speed?
400
When a bowling ball hits the pins, its velocity is 2m/s. The ball was rolling for 5 seconds with an acceleration of -2m/s2. The initial velocity of the ball was ___m/s
What is 12m/s?
400
A bowling ball and feathers are suspended in a vacuum chamber. Both objects are released at the same time. Which object lands first?
What is they both land at the same time?
400
If the diameter of an airplane's radar dome is 8 feet, you can calculate its circumference using this formula involving Pi. What is the circumference of the radar dome? (pi =3)
What is approx. 24m?
400
The hydrostatic pressure of a cylindrical water tank that is 9 meters tall and has a radius of 7 meters, filled with water to a height of 3 meters. The density of water is 1000 kg/m3, and g=10.
What is 30,000 Pa?
500
Three copies of the same book are stacked on a table. One book has a mass of 2kg. What is the force that the table is pushing back on the stack of books. (g=10)
What is 60N?
500
An object changes its speed from 5m/s to 20m/s in 3 seconds. It crashes into a wall with a force of 45N. The object's mass is ___kg.
What is 9kg?
a = (20-5)/3 = 15/3 = 5m/s^2
F=ma --> m=F/a --> m=45/5 = 9kg
500
This reaction is an example of which of Newton's Laws?
What is Newton's 3rd Law?
500
The perimeter of a semicircle with a radius of 3m?
What is 3pi+6 m?
500
A triangular table foot (of a table with 4 legs) has a base length of 2in and a height of 3in. Each leg exerts a force of 12N on the ground. What is the total pressure exerted on the ground by the table?
(do not account for unit conversions, consider inches as meters in this case)
What is 16Pa?
For one leg:
Force = 12N
Area = 0.5bh = 0.5x2x3 = 3in^2
Pressure of one leg = F/A = 12/3 = 4Pa
For 4 legs: 4Pa x 4 = 16 Pa