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SuperTeacherTools |
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There is no unit
Newtons/Newtons cancel out
Whining
e
61.2 kg
w= m x g
m= w/g
600/9.8
100 pounds on earth is about 40 pounds on Mars
Yes, the velocity is changing because the direction is changing and thus there is a net force acting on the car and thus there is acceleration.
See board
moving at constant velocity
.2
zero acceleration
140 cm/sec
1.00/.0071 = 140.85
slowing down
200 newtons west
Tension on rope = 1000 newtons
System will be accelerating to the west
Moving faster
The Force
see board
9.8 newtons
-1.3 m/sec2
60 kg
mu
See board
Ball thrown into the air
b 50 m/sec
8 newtons
Normal force
sketch a position vs. time graph for the following scenario: A man walks forward at a constant rate, then he starts running at a constant rate, then he slows gradually to a stop and stays stopped.
If you were wanting to see how far you could slide along a sidewalk when it was rainy, would you want a shoe with a mu of .5 or .2?
The force of gravity acting on one kilogram on the earth is
Ta on the data collector reads .0071 s after your energy car passes photogate A. What is the speed of the car at photogate in cm/sec?
A box slides down a ramp. A 10-N force of gravity is pulling the box down the ramp while a 2-N force of friction acts to stop the box. What is the net force accelerating the box down the ramp?
An object is moving forward but has negative acceleration. Describe this motion.
Which of the following is not an OHS value:
Positive Attitude
Respect
Compassion
Integrity
Whining
The acceleration due to gravity is:
a 9.8 m/s2 on Earth.
b signified by the letter g.
c a downward acceleration.
d less on the moon than on Earth
e All of the above
A sports car reaches a speed of 25 m/s in 5 seconds after starting from rest. If its acceleration stays the same, what will the speed of the car be at 10 seconds?
a 5 m/s
b 50 m/s
c 125 m/s
d 500 m/s
An object weighs 600. newtons on earth. What is its mass, in kg?
sketch a postion vs. time, speed vs. time, and acceleration vs. time graph for an object that is slowing down at a constant rate in the + direction.
Two men are having a tug-of-war. One individual pulls East with a force of 1000 newtons, and the other pulls to the West with a force of 1,200 newtons. Describe the net force and direction with a vector and state the tension on the rope.
To find the coefficient of kinetic friction by what must you divide the frictional force needed to keep an object moving at a constant rate? (Be more specfic than "weight")
A car drives at constant speed around a corner. Is it accelerating?
What is the SI unit for the coefficient of friction?
The moon is 1/6th as massive as the earth. What would the mass of a 60 kg person be on the moon?
What does a flat line on a speed vs. time graph represent in terms of acceleration?
What Greek letter is used to signifiy the coefficient of friction?
The constant slope of a velocity (m/sec) vs. time (sec) graph is -1.3 . What is the acceleration of the object that is being graphed?
What is the powerful energy field used by the Jedi in Star Wars called?
A steeper line on a postion vs. time graphs indicates what about the speed?
sketch the position vs. time graph, velocity vs. time graph, and acceleration vs. time graph for a skydiver jumping out of an airplane until they reach the ground.
The g force on Mars is roughly 2/5 of the earth's. How would the weight of a 100 pound person on earth compare to their weight on Mars?
What must be true of an object that has no net force acting on it? Answer with regards to the velocity of the object.
Which of the following is a projectile:
A ball thrown into the air
An airplane
A ball rolling across a field
A stapler sliding across a desk
| Description | Match: |
A steeper line on a postion vs. time graphs indicates what about the speed? | Moving faster |
What does a flat line on a speed vs. time graph represent in terms of acceleration?
| zero acceleration |
sketch a postion vs. time, speed vs. time, and acceleration vs. time graph for an object that is slowing down at a constant rate in the + direction. | See board |
sketch a position vs. time graph for the following scenario: A man walks forward at a constant rate, then he starts running at a constant rate, then he slows gradually to a stop and stays stopped. | See board |
sketch the position vs. time graph, velocity vs. time graph, and acceleration vs. time graph for a skydiver jumping out of an airplane until they reach the ground. | see board |
What Greek letter is used to signifiy the coefficient of friction? | mu |
To find the coefficient of kinetic friction by what must you divide the frictional force needed to keep an object moving at a constant rate? (Be more specfic than "weight") | Normal force |
If you were wanting to see how far you could slide along a sidewalk when it was rainy, would you want a shoe with a mu of .5 or .2? | .2 |
What is the SI unit for the coefficient of friction? | There is no unit
Newtons/Newtons cancel out |
A box slides down a ramp. A 10-N force of gravity is pulling the box down the ramp while a 2-N force of friction acts to stop the box. What is the net force accelerating the box down the ramp? | 8 newtons |
A car drives at constant speed around a corner. Is it accelerating? | Yes, the velocity is changing because the direction is changing and thus there is a net force acting on the car and thus there is acceleration. |
The constant slope of a velocity (m/sec) vs. time (sec) graph is -1.3 . What is the acceleration of the object that is being graphed? | -1.3 m/sec2 |
An object is moving forward but has negative acceleration. Describe this motion. | slowing down |
The acceleration due to gravity is: | e |
A sports car reaches a speed of 25 m/s in 5 seconds after starting from rest. If its acceleration stays the same, what will the speed of the car be at 10 seconds? | b 50 m/sec |
What is the powerful energy field used by the Jedi in Star Wars called? | The Force |
The moon is 1/6th as massive as the earth. What would the mass of a 60 kg person be on the moon? | 60 kg |
The g force on Mars is roughly 2/5 of the earth's. How would the weight of a 100 pound person on earth compare to their weight on Mars? | 100 pounds on earth is about 40 pounds on Mars |
An object weighs 600. newtons on earth. What is its mass, in kg? | 61.2 kg
w= m x g
m= w/g
600/9.8 |
Two men are having a tug-of-war. One individual pulls East with a force of 1000 newtons, and the other pulls to the West with a force of 1,200 newtons. Describe the net force and direction with a vector and state the tension on the rope. | 200 newtons west
Tension on rope = 1000 newtons
System will be accelerating to the west |
Which of the following is a projectile: A ball thrown into the air An airplane A ball rolling across a field A stapler sliding across a desk | Ball thrown into the air |
Ta on the data collector reads .0071 s after your energy car passes photogate A. What is the speed of the car at photogate in cm/sec? | 140 cm/sec
1.00/.0071 = 140.85 |
The force of gravity acting on one kilogram on the earth is | 9.8 newtons |
Which of the following is not an OHS value: Positive Attitude Respect Compassion Integrity Whining | Whining |
What must be true of an object that has no net force acting on it? Answer with regards to the velocity of the object. | moving at constant velocity |
