Answer:
207.4 N
Explanation:
The torque on a body is
where r is the radius vector from the point of rotation to the point at which force F is applied.
The product of r and F is equal to the product of magnitude of r and F multiplied by the sine of angle between both vectors.
Therefore, torque is also given by
Where is the angle between r and F.
Use the expression of torque.
Substitute L for r in the equation
Where L is the length of the wrench.
Making F the subject
Force required to pull the wrench is given as,
Substitute for , 25 cm for L, and 115o for
Answer:
No. The protostellar cloud spins faster in the collapsing stage (stage 1) and becomes much slower in the contraction stage (stage 2)
Explanation:
Once the cloud is so dense that the heat which is being produced in its center cannot easily escape, pressure rapidly rises, and catches up with the weight, or whatever external force is causing the cloud to collapse, and the cloud becomes stable, as a protostellar cloud.
The protostellar cloud will become more dense over thousands of years. This stage of decreasing size is known as a contraction, rather than a collapse. In the contraction stage the cloud has become much slower, and because weight and pressure are more or less in balance. In the first stage of formation, the decrease of size is very rapid, and compressive forces completely overwhelm the pressure of the gas, and we say that the cloud is collapsing.
Answer:
Explanation:
Where is the remaining part of the question? This is a very easy one
Answer:
It follows Newton's first law of motion ( law of ineria)
Explanation:
From Newton's first law of motion, a body at rest tends to maintain its initial state or constant motion in a straight line unless acted upon by external force. This is also known as the law of inertia. Considering that the notebook has fallen down and is on the bus floor, this then is at rest. When the bus accelerates, this notebook will obey the law of inertia by remaining at rest. While the bus starts to move, the book tries to remain at rest and that is why it seems to slide backwards.