A 5-N force is applied to a 3-kg ball to change its velocity from 9 m/s to 3 m/s. The impulse is encountered by the ball for a time of seconds.

3.6 s.

Explanation:

Impulse: This can be defined as the product of force and time. The S.I unit of impulse is N.s.

From newton's second law of motion,

The expression for impulse is given as,

I = Ft = m(u-v) Equation 1

make t the subject of the equation

t = m(v-u)/F Equation 2

Where I = impulse, v = final velocity, u = initial velocity, m = mass of the ball, F = force, t = time

Given: m = 3 kg, F = 5 N, u = 9 m/s, v = 3 m/s

Substitute into equation 2

t = 3(9-3)/5

t = 3(6)/5

t = 3.6 s.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

elctricity and magnet is conversion to it