An object is subject to a 84 Nm torque about a point when a 21 N of force is applied to a second point along the object's
length. How far apart are the two points

d = 4[m]

Explanation:

Torque in physics is defined as the product of force by distance. This way you can use the following equation to calculate the torque.

where:

T = torque [N*m]

F = force [N]

d = distance [m]

Now replacing in the equation above.

the bal will not change its velocity.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide