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PHYSICS STUDY GUIDE
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Terms in this set (16)
How much force does a 10-kg brick require to accelerate it as compared to a 1-kg brick if you neglect friction?
Acceleration is directly proportional to the net force, therefore 10 times as much force would be required to move an object with 10 times the mass as something else.
Pulling slowly on the bottom string tied to a heavy ball hanging by a string above it breaks which of the two strings?
Tension in the top sting is the pulling tension plus the weight of the ball. Those two things combined cause the top string to break.
What happens if you apply less force to a horizontally sliding object than is needed to have it maintain a constant velocity?
If the force of friction is greater than the force being exerted on the object to cause it to move, the object will slow down and eventually come to a complete stop.
What is a wagon'a acceleration if its mass in 10-kg and it is being pulled with a horizontal force of 30 N if no other horizontal forces are at work?
Use the base formula F= m x a and rearrange to solve for acceleration.
If a mobile phone is pulled by a northward force of 10 N and at the same time is pulled southward by another force of 15 N what is the resultant?
Apply vector addition/subtraction rules based on how the forces are interacting with each other.
What is the acceleration of a 10 Kg block that is pushed across a horizontal surface with a for of 20 N against a friction force of 10 N.
Apple the formula: Acceleration= net force/ mass.
What does a kilogram measure?
A kilogram measures how much matter is in an object is madeup of (mass), where as weight measures how much gravity pulls on the object(weight).
How much applied force is needed to maintain the constant velocity of an object sliding against a friction force of 10 N?
If it is moving at a constant velocity, the net force is 0 because it is in dynamic equilibrium.
How much does a rock weigh on a planet where a 1-kg rock dropped from rest falls 2 m in 1 second?
Apply the formula d=1/2gt^2.
What happens to the acceleration of an object when it reaches its terminal velocity?
When an object reaches terminal velocity it is no longer accelerating. Acceleration is 0.
Be able to determine which object has a greater mass based on clues.
Mass is based on concentration of matter.
What is the acceleration due to gravity on a planet that required 1 second to fall a distance of 6 m?
Apply the formula d=1/2gt^2.
Which experiences a greater air resistance- a bird's feather falling from a tree to the ground or a coconut doing the same?
The object that experiences a greater air resistance.
What is the net force of an apple in free fall if at rest it weighs 1 N?
In free fall the net force on the apple is equal to its weight.
What net force would produce the acceleration of 10 g's on a human body with a mass of 50 kg?
1 kg = 10 N. Convert 50 kg to N. The amount of force would be determined by how many times the force of gravity the object is experiencing.
In what orientation would a skydiver's terminal velocity be the greatest?
In an orientation that provides them with the greatest opportunity to accelerate- head first.
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