Answer:
The work done is 56 joules.
Step-by-step explanation:
The work done by a force is defined to be the product of the component of the force along and the distance moved:
For our case the displacement vector is
And the work done is
If the unit of length is meters and the magnitude of the force is measured in newtons,then the work done is 56 joules.
Answer:
Option (2)
Step-by-step explanation:
1). If two lines have the same slope, lines are defined as parallel.
m₁ = m₂
2). If the multiplication of the slopes of two lines is (-1), lines will be perpendicular.
m₁ × m₂ = (-1)
Line 1 : It passes through two points (-2, 10) and (1, 1).
Slope of the line 1 =
=
=
m₁ =
Line 2 : It passes through two points (-2, 8) and (2, -4).
Slope of the line 2 =
=
=
m₂ = -3
Since, m₁ × m₂ =
= (-1)
Therefore, given lines are perpendicular to each other.
Option (2) is the correct option.