A)a 0.05 kg mass is used to accelerate a cart. at t=1 second, the 0.5 kg cart is at x=0.5 m, at rest. at t=2.5 seconds, the cart is at 1.5 m, traveling at 1.3 ± 0.3 m/s. calculate and compare the impulse with the total change in momentum of the cart and mass. (read the theory and sections 1.5 through 1.7 if you’re not sure how to do this.)
b) what would be the effect of air resistance and friction on the final velocity and momentum of the cart?
c) if a cart of mass 1.2 kg, traveling at 0.5 m/s, collides elastically with a cart of mass 0.7 kg, initially at rest, what is the final velocity of the first cart?
d) if the two carts above stick together after the collision, what is the final velocity of the first cart?
e) what is the final velocity of the first cart in (c) if the second cart has mass 1.8 kg?
f) what is the final velocity of the first cart in (d) if the second cart has mass 1.8 kg?

An isolated conducting spherical shell carries a positive charge. part a which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? electric potential inside the shell is constant and outside the shell is changing as 1/r2 both the electric potential and the electric field does change with r inside and outside the spherical shell electric potential inside and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is equal to zero electric field inside and outside the shell is constant (does not change with the position r), but is not equal to zero electric field inside and outside the shell is changing as 1/r (where r is the distance from the center of the sphere) electric field inside is equal to zero and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is changing as 1/r electric field inside and outside the shell is changing as 1/r2 electric field inside is equal to zero and outside the shell is changing as 1/r2 electric field inside and outside the shell is zero electric field inside is constant and outside the shell is changing as 1/r

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

See the attachment and solve question 5th