P10 Force and Motion Flashcards

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1
Q

Rearraging resultant force equation

A

F = M x A OR A = F/M and M = F/A

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2
Q

What is Newtons second law

A

Acceleration of an object is :
- resultant force
- Mass of the object

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3
Q

Velocity of an object ……. if the resultant force is in the same direction

A

Increase

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4
Q

The velocity of an object …….. if the resultant force is in the opposite direction

A

decrease

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5
Q

Calculate the resultant force on a sprinter of a mass of 80kg who accelerates at 8 m/s squ

A

640 m/s squ

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6
Q

Calculate the acceleration of a car with 800kg acted on by a resultant force of 3200 N

A

4 N

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7
Q

The greater the …….. on an object , the greater the objects ……..

A
  1. resultant force
  2. Acceleration
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8
Q

The greater the …… of an object , the smaller its …. for a given force

A

1 . Mass
2. Acceleration

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9
Q

The resultant ….. acting on an object is …..

A
  1. Force
  2. F = M X A
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10
Q

What is weight measured in

A

Newtons ( N )

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11
Q

Mass is measured in

A

Kg

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12
Q

gavitational field strengh is measured in

A

N / Kg

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13
Q

Calculate the mass of an object

A

Weight (N) = Mass(kg) X Gravitatioal field strength (N/Kg)

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14
Q

What is Terminal velocity

A

Maximum Velocity ( speed ) of an object

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15
Q

The Gravitational field strength of the surface of the earth was 9.8 N/Kg.
For the moon it was 1.6
Calculate the weight of a persons mass of 50 Kg ?

A

50 X 9.8 = 490

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16
Q

The weight of an object is the ……. acting on the object due to gravity.

A

Force

17
Q

The …… velocity of an object it eventutally reaches when it when its falling

A

Terminal

18
Q

When the force is moving at ….. the resultant force is always 0

A

Terminal velocity

19
Q

The breaking force of an moving object depends on …

A
  • How much alcohol you have drunk
  • The speed of a vehicle
20
Q

The ….. mass , The greater the …….

A
  1. greater
  2. breaking speed
21
Q
A