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Speed and Acceleration Graphs. Chapter 10. CH10 Question 1. Describe the object’s motion in the graph above. Move a at constant speed for 4 sec, slows down for 3 seconds then speeds up but not to original velocity. CH10 Question 2. Describe the object’s motion in the graph above.

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ch10 question 1
CH10 Question 1

Describe the object’s motion in the graph above.

  • Move a at constant speed for 4 sec, slows down for 3 seconds then speeds up but not to original velocity.
ch10 question 2
CH10 Question 2

Describe the object’s motion in the graph above.

  • Move a at constant speed for 4 s, and comes to a rest.
ch10 question 3
CH10 Question 3

Describe the object’s motion in the graph above.

  • Positive acceleration for 5 seconds – speeds up.
ch10 question 4
CH10 Question 4

Describe the object’s motion in the graph above.

  • Constant speed 150s, const +accl. For 100 s. Constant speed again for 50 sec, then – accl for one sec.
ch10 question 41
CH10 Question 4

Calculate the object’s acceleration from 150 to 250 seconds.

  • Vf-Vi/t = 30-10/100= 0,2 m/s2
ch10 question 42
CH10 Question 4

Calculate the object’s acceleration from 300 to 350 seconds.

  • Vf-Vi/t = 5m/s-30m/s/50 s= -0.5 m/s2
question 1
Question 1

State Newton’s First Law of motion

  • An object at rest will remain at rest and object in motion remain in motion unless acted on by a net force.
question 2
Question 2

State Newton’s Second Law of Motion

  • An object will accelerate in the direction of a net force.
question 3
Question 3

State Newton’s Third Law of Motion

  • For every action there is an equal and opposite reaction.
question 11
Question 1

What is the equation for calculating Force when you know an object’s mass and acceleration?

question 12
Question 1

What is the equation for calculating Force when you know an object’s mass and acceleration?

  • Force = mass x acceleration
  • F = ma.
question 21
Question 2

What are the units for Force?

question 22
Question 2

What are the units for Force?

  • Kg  m/s2
  • N = Newton
question 31
Question 3

A sailboat with a mass of 1000 kg is accelerating at a rate of 8 m/s2. What is the force of the wind acting on the sail?

  • F= ma
  • F = 1000 kg x 8 m/s2 = 8000 N
question 13
Question 1

What equation do you use to calculate acceleration if you know the force acting on the object and its mass?

  • F= ma
  • A = F/m = F  m
question 23
Question 2

What are the units for acceleration?

  • m/s2
  • “meters per second squared”
question 32
Question 3

What is the acceleration of a 50Kg swimmer that pushes off the side of the pool with a force of 100N?

  • a = F/m = 100 kgm/s2 50 kg = 2 m/s2
question 14
Question 1

What is the formula used to calculate mass when you know the Force on an object and the resulting acceleration?

  • F = ma
  • m = F/a = F  a
question 24
Question 2

A weight lifter accelerates the barbell at a rate of 2.0 m/s2 with an applied force 400N. What is the mass of the barbell?

  • m = F/a = 400 kg m/s2  5 m/s2
  • = 80 kg
question 33
Question 3

What is the relationship between mass and inertia??

  • As the mass increases the inertia of an object increases and a greater force will be required to accelerate the object.
question 15
Question 1

What is the formula used to calculate the weight of an object on Earth?

  • weight = mass x gravitational acceleration.
  • Gravitational acceleration on earth = 9.8 m/s2
question 25
Question 2

What is the difference between mass and weight?

  • Mass is a measure of how much matter an object contains.
  • Weight is a measure of the force of gravity acting on that mass.
question 34
Question 3

Calculate the weight of 10 kg of gold sitting on your desk.

  • weight = mass x ag
  • ag =9.8 m/s2
  • W = 10 kg x 9.8 m/s2 = 98 N
question 16
Question 1

Name this equation and the variables that compose it.

question 17
Question 1

Name this equation and the variables that compose it.

  • Universal Gravitation
  • F = force of gravity
  • G = gravitational constant
  • m = mass of the objects
  • D2 = distance between the objects
question 26
Question 2

According to the equation what happens to the gravitational force between two objects when they get farther apart?

question 27
Question 2

According to the equation what happens to the gravitational force between two objects when they get farther apart?

d2 increases and the force of gravity gets smaller.

question 35
Question 3

According to the equation why does our sun have a gravitational force strong enough to hold all the planets in orbit even though some are very far away.

question 36
Question 3

According to the equation why does our sun have a gravitational force strong enough to hold all the planets in orbit even though some are very far away.

  • The sun has a very large mass so its gravitational force is large and far reaching.
question 18
Question 1

What is the term used to describe an object where the only force acting on the object is gravity ?

  • Free Fall
question 28
Question 2

This is the maximum velocity a falling object will reach as the upward force of air resistance equals the downward force of gravity?

  • Terminal velocity
question 37
Question 3

If an object at terminal velocity is experiencing balanced forces, how can the object still be falling?

  • Balanced forces only mean that the object is not ACCELERATING, it still falls @ a constant velocity.
question 19
Question 1

A fluid includes which three states of matter?

  • Liquids, gases, and plasmas
question 29
Question 2

What is the formula used to calculate pressure and what unit is pressure reported in?

  • P = mass  Area = N/m2 = Pa
  • Usually kPa (kilo Pascals)
question 38
Question 3

What is the air pressure if 20 N is exerted over an area of 10m2?

  • P = mass/Area = 20N  10m2
  • = 2 Pa
question 110
Question 1

According to Bernoulli’s Principal what happens to the pressure of a fluid as the velocity of the fluid increases?

question 111
Question 1

According to Bernoulli’s Principal what happens to the pressure of a fluid as the velocity of the fluid increases?

  • The pressure decreases.
question 210
Question 2

What is the upward force exerted on an object immersed in a fluid?

  • Buoyant force or buoyancy.
question 39
Question 3

Archimedes Principal states that for an object to float the weight of the object must be equal to or less than .. . . ?

question 310
Question 3

Archimedes Principal states that for an object to float the weight of the object must be equal to or less than .. . . ?

  • the weight of the fluid displaced by the object.
question 112
Question 1

What term is used to describe the resistance of of a gas or liquid to flow?

  • Viscosity.
question 211
Question 2

Hydraulic devices can increase the output force by increasing the output area. Which principal predicts this characteristic?

  • Pascal’s Principal- the pressure of a liquid in an enclosed system is uniform throughout the system.
question 311
Question 3

According to the Venturi effect, what happens to the velocity of a fluid when it is forced to flow through a smaller area??

  • The velocity of the fluid increases..
question 113
Question 1

What is the term for any object thrown or launched from Earth under the influence of gravity?

  • Projectile
question 212
Question 2

Describe the horizontal and vertical forces acting on the cannon ball.

question 312
Question 3

Which will hit the ground first, the cannon ball dropped straight down or the one launched sideways?

They both hit at the same time – horizontal motion is independent of vertical free-fall.