Show:
Motion
Force
Newton's Laws
Electricity/ Changes
Work and Power
100

This is an objects inital velocity subtracted from its final velocity and divided by time.

What is acceleration?

100
ALL- This is the tendancy of a stationary object to resist being put into motion.
What is INERTIA?
100
Which object has a bigger force of gravity. A 0.1 kg apple, or a 10kg weight?
10kg weight
100
How is resistance calculated?
R= the amount of volts going into a circuit verses the amount of current flowing through a circuit
100

This SI Base unit is defined as 1 Newton x 1 meter per second.

What is the WATT? 1 joule = 1 Newton x 1 meter; 1 watt = 1 joule / 1 second

200

Which is accelerating?  A) Bob goes from 22 mph to 74 mph in 8.56 s   or B) Mary obeys the 55 mph speed limit for 20 minutes

A

200
ALL- An object is moving in a straight line at a constant speed. This is what will happen if no outside force acts on the object. (speed will _______, direction will _____)
What is The speed and direction of the object will not change?
200
ALL- Amy is jumping rope. This of Newton's laws best describes why she is able to get her body off the ground when she pushes downward with her feet.
What is Newton's Third Law of the Action-Reaction Law?
200
Adding heat to cause a phase change is this type of change
Physical
200
If a kayak is paddled a distance of 40 meters in 20 seconds with a force of 200 N, What is it's power?
What is 400 watts? Work = force x distance = 200 N x 40 m = 8000 Joules Power = work / time = 8000 J / 20 s = 400 watts
300
This is the velocity of a tennis ball that travels 90 meters in 5 seconds.
What is 18 m/s?
300
ALL- Karen and Justine are each trying to move a box across the floor. The boxes the same size and shape but Karens box has twice the mass of Justines. If Justine must apply 35 N of force to put her box into motion, this is the force Karen must apply to move her box.
What is 70 Newtons?
300
A 3kg object is being pulled by a 10N force. Friction is present. What is the net force on this object if it is moving with a constant speed of 5 m/s?
0N
300
Power = voltage X current A hair dryer has the power rating of 1200 watts and has the current flow of 10 amps. How much voltage is required?
120V
300
Tyrese is trying to move a large rock. He applies a force of 75 Newtons but is still unable to budge the rock. This is how much work has Tyrese done.
What is no work? (or 0 joules) w = f x d = 75 N x 0 m = 0 joules
400
A car's velocity changes from 0 m/s to 40 m/s in 5 seconds. The term velocity is used incorrectly. Why?
A direction is not given.
400
FIRST ANSWER ONLY! How big a force does it take to give a 50 kg object an acceleration of 40 meters per second squared?
What is 2000 Newtons? (F = m x a; F = 40 m/s2 x 50kg)
400
You throw a ball. When the ball is meters away from your hand, is the force of your hand still acting on the ball?
No
400
A chemical change has occured in a beaker and the solution turned hot. Which reaction has occurred; endothermic or exothermic?
Exothermic
400
The motor of a Ferrari is more powerful than that of a smart car. Which of the following must be true of the Farrari's motor: a. it can do work more quickly b. it can operate for a longer time c. it can store more potential energy
What is a. it can do work more quickly? (Power = work/time)
500
If a graph that relates speed (y-axis) to time (x-axis), the slope of a line that represents zero acceleration will be: a. verticle b. horizontal c. increasing steadily d. none of these
What is b. horizontal?
500
ALL- A 70 kg skier leaves a ski jump at a velocity of 14m/s. This is the skier's momentum at that instant.
What is 980 N x s? (or 980 kg x m/s)
500
A quaterback on a football team is getting ready to throw a pass. If he is moving backwards at 1.5 m/s and he throws the football forward at 10.0m/s relative to his body, what is the velocity of the ball relative to the ground? Which law?
-1.5 ms/ + 10.0m/s = 8.5 m/s Newton's 1st Law
500
Identify this reaction as endothermic or exotheric. Identify this change as physical or chemical. Frying an egg.
endothermic, chemical
500
\ This is the power required to carry a 35 N package a vertical distance of 18 m if the work on the package is accomplished in 30 s.
What is 21 Watts? ( W = f x d = 35 N x 18 m = 630 j), (P = W / t = 630 j / 30 s = 21 Watts