7. A 0.4 kg toy car is subjected to a constant force of 2 N that accelerates it from 0.5 to a speed of 0.75 m/s. What is the impulse applied to the toy
car?

A. 0.1 m/s
B. 0.1 kg m/s
C. 0.25 m/s
D. 1.65 kg m/s

E = 7200 J = 7.2 KJ

Explanation:

The electric field due to a sphere is similar to the electric field due to a point charge. It is calculated by the use of the following formula:

where,

E = Electric Field = ?

k = Coulomb Constant = 9 x 10⁹ Nm²/C²

q = charge on sphere = 2 μC = 2 x 10⁻⁶ C

r = distance from the center of the sphere to the location = 5 cm = 0.05 m

Therefore,

E = 7200 J = 7.2 KJ