Answer:
An electromagnet is a soft metal core made into a magnet by the passage of electric current through a coil surrounding (wrapped around) it.
Answer:
The magnitude of the acceleration of the boy toward the girl is 
Explanation:
It is given that,
Mass of the boy, 
Mass of the girl, 
The acceleration of the girl toward the boy is, 
To find,
The acceleration of the boy toward the girl.
Solution,
Let
is the magnitude of the acceleration of the boy toward the girl. We know that force acting on one object to other are equal in magnitude but opposite in direction. So,






So, the magnitude of the acceleration of the boy toward the girl is 
Answer:
The normal force is 85,42 N
Explanation:
There is no friction force, therefore there is no relationship between the normal force and the friction.
We can find the normal force using a free body diagram and check the forces that are acting on the sled. The total forces are equal to 0 because there is no movement in the y-axis. The movement exists only on the x-axis.
Answer:
but where are the options?
We need more information such as how high it was falling from