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Physics Review (Forces, Movement, Elasticity) (2 ...
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An unstretched spring has a length of 0.10 meters. When the spring is stretched by a force of 16 newtons, its length is increased to 0.18 meters. What is the spring constant of this spring?
2.0 N/cm
(Breakdown, Elastic limit, End of tether, Fracture stress) Hooke's Law fails when a material reaches its:
Elastic limit.
A spring extends elastically by 0.1 m when a force of 2 N is applied. What is the value of its spring constant?
20
A spring extends elastically by 10 cm when a force of 20 N is applied to it. What force would be needed to extend the spring by 5 cm?
10 N
Has this material stretched beyond the limit of proportionality?
No.
(DIRECTLY PROPORTIONAL, INVERSELY PROPORTIONAL) Which of the following is the relationship between the force applied to a spring and its extension?
Directly proportional.
Harry Styles has a Weight of 732 N on Mars where the acceleration due to gravity is 3.7m/s/s. What is his mass on Mars?
197.8 kg
Rob Gronkowski spiked a 1.4kg football at the ground at an acceleration of 1.7m/s/s. What is the force at which the ball was spiked?
2.38 N
A squirrel has a weight of 4.9 N. What is his mass if he is running on the ground?
0.5 kg
(Mass Weight Density Acceleration) Among the choices, which of the following is the object's mass coupled with the gravitational force?
Weight.
TRUE OR FALSE: An object is under uniform acceleration when its direction is straight.
False.
TRUE OR FALSE. A negative acceleration would imply that the object in question is in constant speed.
False.
What are the units for acceleration?
meter per second squared (m/s^2)
A car travels 120 miles in 12 hours. What is the car's speed?
10 mph
What law of motion does the picture illustrate?
Third law.
According to Newton's second law, what happens if you increase the force applied to an object?
It accelerates more.
A car driving down the road runs out of gas (petrol), its acceleration decreasing but still moving. Which of Newton's laws explains why the car continues to move without gasoline (petrol)?
1st Law of Motion (Law of Inertia)
If a 40 kg student is pushed in a rolling chair with a force of 30 N, what is the student's acceleration?
0.75
Balanced or Unbalanced?
Unbalanced.
How will this object move?
It will move to the right.
A ____________ is a push or a pull on an object.
Force
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