Answer: Her velocity magnitude (v) relative to the shore is 5.70 km/h.
Explanation:
Let Q be the speed of the boat, and P be the speed of the river flow.
R represents the resultant velocity combining boat velocity and river current.
According to vector addition using the law of triangles:
From the diagram:
P = 3.5 km/h, Q = 4.5 km/h
Therefore, her velocity magnitude relative to the shore is 5.70 km/h.
Answer:
The acceleration of the platform is - 1.8 m/s²
Explanation:
The net force on a body causes that body to accelerate in the direction of the resultant force applied.
Setting up the force equilibrium for the configuration:
ma = 800 - mg
100a = 800 - 100×9.8
100a = - 180
100a = - 180
a = - 1.8 m/s²
This indicates that the body is falling downward.
Answer:
When ice is subjected to heat, it melts; however, the temperature remains constant at 0◦ C.
Explanation:
Solution
The heat supplied by the heater is solely utilized for the melting of the ice, thus maintaining the temperature at 0◦ C.
Once all the ice has liquefied, the temperature of the resulting water will start to rise over time.
Note: please see the attached document with solutions featuring diagrams related to this explanation
