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Ninth Grade (Grade 9) Physics Questions

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Grade 9 :: Fluid Mechanics by kurtman
You open a cooler to get a soda on a hot summer day and notice a can of diet soda is floating while the cans of regular soda are not floating. What can you infer about this situation? Which is the best statement that describes why?
  1. The water must be flowing upward in the area of the diet soda.
  2. There must be less matter in the regular can of soda.
  3. The diet soda must have less mass per unit of volume than the surrounding water.
  4. The diet soda can must be made of a different kind of material.
Grade 9 :: Forces and Motion by Courtney_Nicole
An object with a mass of 1 kilogram on Earth
  1. has less mass on the Moon
  2. has the same mass on the Moon
  3. has more mass on the Moon
  4. weighs the same everywhere
Grade 9 :: Forces and Motion by Courtney_Nicole
Consider your book is at rest on a table. When you push it horizontally and it's on the verge of sliding, but still at rest, friction on the book acts in a direction that is
  1. opposite to your push
  2. the same direction as your push
  3. at right angles to your push
  4. in no direction until the book slides
Grade 9 :: Energy and Momentum by Ddavis88
What is equal to the product of mass and velocity?
  1. inertia
  2. force of gravity
  3. weight
  4. momentum
Grade 9 :: Forces and Motion by Courtney_Nicole
If a ball rolls down an inclined plane and picks up a speed of 4 m/s each second it rolls, its acceleration is
  1. one half of 4 m/s
  2. one half of 4 m/s squared
  3. 4 m/s squared
  4. 10 m/s squared
Grade 9 :: Forces and Motion by Courtney_Nicole
The acceleration of a rain drop that falls at constant velocity
  1. is zero
  2. is directed downward
  3. decreases over time
  4. increases over time
Grade 9 :: Forces and Motion by Courtney_Nicole
Grade 9 :: Forces and Motion by Courtney_Nicole
Grade 9 :: Magnetism and Electricity by jlovering
Complete the following statement:

If you increase the resistance in a series circuit,                               .
  1. the current will also increase
  2. the current will decrease
  3. the voltage will increase
  4. the voltage will decrease
Grade 9 :: Forces and Motion by jlovering
Ball A is a 1.50 kg ball moving at 8.00 m/s south. It strikes Ball B, a 2.00 kg ball moving at 3.00 m/s south. The velocity of Ball B after the collision is 4.50 m/s south.

What is the momentum of Ball A before the collision and after the collision?
  1. 12 before the collision, 12 after the collision
  2. 18 before the collision, 12 after the collision
  3. 12 before the collision, 9 after the collision
  4. 20 before the collision, 0 after the collision
Grade 9 :: Heat Transfer by der1228
Friction causes kinetic energy to be converted into
  1. potential energy.
  2. thermal energy.
  3. mechanical energy.
  4. electrical energy.
Grade 9 :: Heat Transfer by CianKelly
Grade 9 :: Magnetism and Electricity by jlovering
Grade 9 :: Simple Machines by jlovering
If a machine has a mechanical advantage less than one, which of the following must be true:
(Think carefully)
  1. The Effort Force is less than the Resistance Force
  2. The Effort Distance is greater than the Resistance Distance
  3. The Effort Distance is less than the Resistance Distance
  4. The Effort Force and Resistance Force are the same.
Grade 9 :: Magnetism and Electricity by jlovering
When you are at home, turning off a light usually does not turn off your T.V. This is because                                                            .
  1. most electrical devices in a house are on parallel circuits
  2. most electrical devices in a house are on series circuits
  3. they have different sources of voltage
  4. a T.V. does not require electricity
Grade 9 :: Waves and Sound by zvolanem
The pitch of a sound depends on its
  1. frequency
  2. resonance
  3. amplitude
  4. intensity
Grade 9 :: Waves and Sound by zvolanem
The speed of sounds depends on               ? (choose more than one)
  1. Elasticity
  2. Resonance
  3. Density
  4. Loudness
  5. Frequency
  6. Temperature
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