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Physics > First Test S1 > Flashcards

First Test S1 Flashcards

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1
Q

What 3 things can forces change?

A

Shape
Direction
Speed

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2
Q

What are some examples of forces changing the speed of an object

A

Someone kicking a football
Throwing a paper airplane
Squeezing a tube of toothpaste

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3
Q

What are some examples of shape.

A

Juicing a lemon
Squeezing a ball
Moulding clay

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4
Q

What are some examples of direction

A

Turning the steering wheel of a car
Leaves blowing in the wind
A wind vein moving in the direction

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5
Q

What is another word for the newton balance

A

Spring balance

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6
Q

What is the formula to figure out the weight of something on earth?

A

W=MxG

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7
Q

How does a newton balance work

A

The spring will move a set distance depending on the amount of weight the object has.

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8
Q

How can you decrease friction

A

Having a smoother surface

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9
Q

What type of energy is produced when you rub your hands together

A

Heat energy

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10
Q

What will happen if an object is at rest and balanced

A

Remain still

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11
Q

If an object is already moving at a steady speed in a straight line and balanced forces act on it then it will

A

Move at a constant speed in a straight line

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12
Q

When measuring any physical quantity in physics we need?

A

A unit of measurement and apparatus to measure it

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13
Q

What features of shape affect the force of friction on the object?

A

Length

Width

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14
Q

What is the definition of mass

A

The total mass in any object measured in Kg the mass of an object never changes

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15
Q

What’s the definition of weight

A

Weight is a force and is the pull of gravity on a mass measured in (N) (newtons)

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16
Q

What is the definition of a gravitational field

A 
The region of space surrounding a body in which another body experiences a force of gravitational attraction 
Unit is (N/Kg)
17
Q

Why does a seatbelt stop you from flying out the car

A

Unbalanced braking force slow car and man together as seatbelt attaches
Man to car

18
Q

What would happen in a car crash if you weren’t wearing a seatbelt

A

You would be travelling at the same speed as the car and go out through the windshield at the same speed that the car was going in a straight line

19
Q

What are some differences between weight and mass

A 
Weight
Measured in newtons 
Changes throughout universe 
Depends in gravitational field strength 
Measured by newton balance 
Mass 
Measured in kg 
Stays constant doesn’t change 
Amount of matter 
Measured by electronic scale
20
Q

How would you increase friction

A

Making a rough surface

Physics (4 decks)

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