D. is the correct answer forthis question
The correct answer that would best complete the given statement above would be the last option: COLDER. Climates on Earth get colder <span>as you move from the equator to the poles. The places that are located near or on the equator experience the warmest or the hottest climates such as Africa. Hope this answer helps. </span>
Answer with Explanation:
We are given that
a.We have to find the torque on the particle about the origin.
We know that
Torque=
By using the formula
b.
Substitute the values then we get
Because
Answer:
Explanation:
<u>Net Force
</u>
The second Newton's law explains how to understand the dynamics of a system where several forces are acting. The forces are vectorial magnitudes which means the x and y coordinates must be treated separately. For each component, the net force must equal the mass by the acceleration, i.e.
The box with mass m=20 kg is pulled by a rope with a angle above the horizontal. It means that force (called T) has two components:
We'll assume the positive directions are to the right and upwards and that the box is being pulled to the right. There are two forces in the x-axis: The x-component of T (to the right) and the friction force (to the left). So the equilibrium equation for x is
There are three forces acting in the y-axis: The component of T (upwards), the weight (downwards), and the Normal (upwards). Since there is no movement in the y-axis, the net force is zero and:
Rearranging:
Solving for N in the y-axis:
The friction force is given by
Replacing in the equation for the x-axis, we have
Replacing the formula for N in the equation for the x-axis
Operating and rearranging
Solving for T:
Plugging in the given values: