P8 Flashcards

1
Q

Displacement

A

Distance in a given direction

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2
Q

Driving force

A

force of a vehicle that makes it move (sometimes referred to as motive force)

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3
Q

Forces

A

a force (in newtons, N) can change the motion of an object

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4
Q

Free-body force diagram

A

a diagram that shows the forces acting on an object without any other objects or forces shown

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5
Q

Friction

A

the force opposing the relative motion of two solid surfaces in contact

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6
Q

Magnitude

A

the size or amount of a physical quantity

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7
Q

Newton’s first law of motion

A

if the resultant force on an object is zero, the object stays at rest if it is stationary, or it keeps moving with the same speed in the same direction

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8
Q

Newton’s third law of motion

A

when two objects interact with each other, they exert equal and opposite forces on each other

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9
Q

Parallelogram of forces

A

a geometrical method used to find the resultant of two forces that do not act along the same line

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10
Q

Resultant force

A

a single force that has the same effect as all the forces acting on the object

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11
Q

Scalar

A

a physical quantity, such as mass or energy, that has magnitude only (unlike a vector which has magnitude and direction)

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12
Q

Vector

A

a vector is a physical quantity, such as displacement or velocity, that has a magnitude and a direction (unlike a scalar which has magnitude only)

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