Solid, because you said it dissolved.<span />
Answer:
e. Both the acceleration and net force on the car point inward.
Explanation:
If no net force acts on the car, the car must drive in a straight line, at constant speed.
As the acceleration is defined as the rate of change of the velocity vector, this means that it can produce either a change in the magnitude of the velocity (the speed) or in the direction.
In order to the car can follow a circular trajectory, it must be subjected to an acceleration, that must go inward, trying to take the car towards the center of the circle.
The net force that causes this acceleration, aims inward, and is called the centripetal force.
It is not a different type of force, it can be a friction force, a tension force, a normal force, etc., as needed.
Answer:
option A is correct
Explanation:
Given:
The length to be painted = m miles
The width to be painted = t inches
Area painted in 1 gallon = p square feet
Converting the every given dimension in feet, we have
length to be painted = m × 5280 feet
width to be painted = t/12 feet
area to be painted = (m × 5280 feet) × t/12 feet
now, applying the unitary method, we have
p square feet is painted ⇒ 1 gallon
1 square feet is painted ⇒ 1/p gallon
(m × 5280 feet) × t/12 feet square feet is painted ⇒ [(m × 5280 feet) × t/12 feet ] × 1/p gallon
thus, we get the gallons of paint required as 5820 mt/12p
hence option A is correct
Answer: 1.76 Nm
Explanation:
If the force pulls horizontally, this means that the force is tangent to the disk at any point of the string unwinding process, so the distance d is irrelevant.
In this case, the torque is directly given by the product of the force times the distance perpendicular to the center of the disk, which is just the radius, as follows:
τ = F * r = 16 N. (0.11) m = 1.76 Nm
