Answer:
5 units to the left
Explanation:
I had the same question :)
Answer:
Explained
Explanation:
Given:
Ship travels due east from the Bar Harbor 38 miles before turning north
Yes it possible to calculate the exact direction of the ship by assuming there are no large islands in the way, and that the isolated ship does not cut off very far, then what we have here is a right triangle with a 72-mile as hypotenuse and a 38-mile as "adjacent" side. If θ is the angle out of Bar Harbor, we can write
, and θ = 58.14457°, or 58° 8' 40" north of east. That will be the exact direction.
A roller coaster is stopped on a track. When the engineer presses a launch button on the coaster, the coaster moves forward. Explain this change in terms of balanced and unbalanced forces.
Answer: None of the options
Explanation:
When we talk about uniform circular motion (constant speed) we yet have a changing velocity and therefore, acceleration.
How is this possible?
Well, velocity is a vector, and as a vector it has magnitude (the speed) and direction. So, while an object performs a uniform circular motion, althought its speed is not changing, its direction does change.
And, since acceleration is the variation of velocity in time , certainly there is acceleration here.
On the other hand, Inertia is mathematically expressed as:
This means that for a system with a given axis of rotation and a given total mass , the greater the distance from the axis to the object that performs the circular motion, the greater the inertia.
This also means that inertia depends directly on the mass of the system and the radius of the circular motion, therefore, as long as these elements exist, in a circular motion the inertia will always be different from zero.