Question

The vector F and d are parallel to each other if |F|=10N and F.d=20Nm then find the value of |d| also find F.d when the angle between them is 60°

Answer 1

since F and d are parallel, theta = 0.

F.d = |F| |d| cos(theta) = 10×|d| × 1 = 20

|d| = 20/10 = 2
______________________

theta = 60°
F.d = 10×2× 1/2 = 10

Answer 2

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since F and d are parallel, theta = 0.

F.d = |F| |d| cos(theta) = 10×|d| × 1 = 20

|d| = 20/10 = 2

______________________

theta = 60°

F.d = 10×2× 1/2 = 10.

HOPE SO IT WILL HELP......