Forces In Balance P8

Question 1

Vector

Answer 1

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)

Question 2

Scalar

Answer 2

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

Question 3

resultant force

Answer 3

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

Question 4

parallelogram of forces

Answer 4

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

Question 5

Newton’s third law of motion

Answer 5

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

Question 6

Newton’s first law of motion

Answer 6

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

Question 7

magnitude

Answer 7

the size or amount of a physical quantity

Question 8

friction

Answer 8

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

Question 9

free-body force diagram

Answer 9

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

Question 10

forces

Answer 10

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

Question 11

driving force

Answer 11

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

Question 12

displacement

Answer 12

distance in a given direction