Answer:
39.2m/s
Explanation:
Given parameters:
Mass of book = 5kg
Time taken for fall = 4s
Unknown:
Final velocity of the book = ?
Solution:
Serena dropped the book from rest therefore, the initial velocity of the book is 0.
Let us find the appropriate motion equation to solve this problem;
V = U + gt
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity = 9.8m/s²
t is the time taken
Insert the given parameters and solve;
V = 0 + 9.8 x 4 = 39.2m/s
It's just 53m
Displacement usually requires a direction but as it specifies to just give magnitude you can just say 53m :)
Answer:
It will produce a stronger magnetic field.
Explanation:
Ampere’s law states the magnetic field of a solenoid is directly proportional to the current supplied.
The answer to this question is distance.
