Aconstant braking force of 10 newtons applied for 5 seconds is used to stop a 2.5-kilogram cart traveling at 20 meters per second. the magnitude of the impulse applied to stop the cart is

The impulse applied to in object produce an equal force to change the leaner momentum of the object.  The magnitude of the impulse applied to stop the cart is 50 N.s.

Impulse:

The impulse can be calculated as,

Where,

F - force = 10 N

T - time =  5 sec.

put the value in the formula,

Hence, we can conclude that the magnitude of the impulse applied to stop the cart is 50 N.s.

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the higher the current the higher the mag field around it the higher the influence on the compass

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.