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Science
Physics
Kinetic Energy & Potential Energy Test
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Gravity
Unit 1
Terms in this set (15)
A skier at the top of the mountain
is an example of Potential energy
A race car traveling at its maximum speed
is an example of Kinetic Energy
A car has a mass of 2,000 kg and is traveling at 28m/s. What is the car's kinetic energy?
784000J
You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a velocity of 30 m/s. What is the kinetic energy?
945J
The faster an object moves the greater its ____________ energy.
kinetic
What type of units is Kinetic Energy measured in?
Joules
An object falling from 50m will have ___________ potential than an object falling from 30m.
Greater
The amount of kinetic energy in an object is determined by its
speed and mass
What is the formula for kinetic energy?
KE=1/2mv^2
What is the formula for speed?
distance/time
A dog traveled a distance of 3 m in 90 seconds. Calculate the speed. Speed= Distance/Time
0.03m/s
What does m stand for in the equation .5(m)X(v)^2?
mass
Speed is the same as what?
velocity
What does the d stand for in the formula D/T?
distance
What happens to Kinetic Energy as Potential Energy is decreased?
Kinetic energy increases
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Verified questions
PHYSICS
When a drop of water is placed on a flat, clear surface such as a glass slide or plastic sheet, surface tension pulls the top surface into a curved, lens-like shape so that the drop functions as a simple magnifier. Suppose a drop of water has a maximum angular magnification of 3.50. Find the drop's focal length.
PHYSICS
Consider a circuit consisting of a battery with an emf $\boldsymbol { \varepsilon }$ and an internal resistance of r connected in series with a resistor R and a capacitor C. Show that the total energy supplied by the battery while charging the battery is equal to $\varepsilon ^ { 2 } C$.
PHYSICS
A disk rotates freely on a vertical axis with an angular velocity of 30 rpm. An identical disk rotates above it in the same direction about the same axis, but without touching the lower disk, at 20 rpm. The upper disk then drops onto the lower disk. After a short time, because of friction, they rotate together. The final angular velocity of the disks is A. 50 rpm B. 40 rpm C. 25 rpm D. 20 rpm E. 10 rpm
PHYSICS
Two blocks on a level, frictionless table are in contact. The mass of the left block is 5.00 kg and the mass of the right block is 10.0 kg, and they accelerate to the left at $1.50\ \mathrm{m/ s^2}$ . A person on the left exerts a force ($F_1$) of 75.0 N to the right. Another person exerts an unknown force ($F_2$) to the left. (a) Determine the force $F_2$. (b) Calculate the force of contact N between the two blocks (that is, the normal force at their vertical touching surfaces).
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