Misc.
Density
Momentum
Need for Speed (and other fast things)
Projectile Motion
100
What is the name of the button on a digital scale used to zero the amount?
Tare
100
What is the formula to find density?
100
What is the formula for momentum and what are the units?
[kg m/s]
100
What is the difference between speed and velocity?
Velocity is a vector quantity so it will have magnitude and direction. Speed is a scalar quantity and will only have magnitude
100
What is the acceleration due to gravity?
-9.8m/s2
200
How many mm are in 1km?
1,000,000 mm in 1 km
200
What are the units of density?
g/cm^3 OR kg/m^3
200
What us the formula that expresses the conservation of momentum? (think collision)
m1v1i + m2v2i = m1v1f + m2v2f
200
What is the definition of accelaration?
acceleration is the change in velocity (speed, direction, or both) over time
200
In your own words, what is the definition of projectile motion?
Projectile motion is movement of an object in a curved path toward the ground because it has both a horizontal force and the downward force of gravity acting on it.
300
Knowing that 1 mile is 1600m, convert 1mi to km
1.6km
300
A block is 30mm long, 5mm wide, and 16mm tall. What is the volume of this block in cm3?
2.4 cm3
300
A car with a mass of 1300kg is traveling 20m/s east on a road. It collides and sticks to a 2600kg vehicle that is traveling west at 15m/s. Is this collision elastic or inelastic?
When two objects "stick" together, this is an inelastic collision
300
Uniform motion:
What is the equation for final velocity (vf) given the initial equation of a = vf - vi * t ?
vf = vi + a * t
300
What is the definition of sin ?
opposite/hypotenuse
400
How many milliliters are in 1 liter?
1000ml in 1
400
A block is 30mm long, 5mm wide, and 16mm tall. What is the density of this block if it has a mass of 2g?
(be sure to use the correct units)
0.833 g/cm3
400
A car with a mass of 1300kg is traveling 20m/s east on a road. It collides and sticks to a 2600kg vehicle that is traveling west at 15m/s. Since these two objects stick together, what variable in the conservation of momentum equation will you solve for?
vf which will be the same for both objects (v1f = v2f = vf
400
Uniform motion:
Use the equation for vf (vf = vi + a * t) and displacement (s = vavg * t) to come up with an equation for find displacement
s = (at2 /2) + vit
400
What letter is used to note the maximum altitude a projectile reaches?
H = max. height
500
How would you measure the thickness of a sheet of paper?
measure many sheets so that you can get an accurate measurement. Then divide the measurement by the total number of sheets
500
A perfect cube has side lengths of 8mm and a mass of 5g. What is the density of this cube?
(be sure to use the correct units)
9.8 g/cm3
500
A car with a mass of 1300kg is traveling 20m/s east on a road. It collides and sticks to a 2600kg vehicle that is traveling west at 15m/s. What is the vf from this collision?
-3.33 m/s
Negative indicates the objects will be moving west
500
What is the equation for velocity when an object is in free fall?
vf = a * t
(where a = g = 9.8m/s2)
500
For a projectile leaving the ground, what equation can be used to represent velocity in the y direction?
vy = v* sin (theta)