A student wants to determine the impulse delivered to the lab cart when it runs into the wall. The student measures the mass of
the cart and the velocity of the cart before it hits the wall. What other measurement is necessary to calculate the impulse delivered to the lab cart? the velocity of the cart after it hits the wall
the force exerted on the cart by the wall
the time the cart is in contact with the wall
the acceleration of the cart before it hits the wall
Answer: the velocity of the cart after it hits the wall
Explanation:
Impulse is the force exerted in a small interval of time. It can also be defined as the change in momentum.
I = F Δt = m v - m u = m(v-u)
where, m is the mass of the object, v is the final velocity and u is the initial velocity.
It is measured in Newton-seconds or kilogram-meter per second.
When the mass of the cart and initial velocity is given, the final velocity is required after it hits the wall in order to calculate the impulse delivered to the lab cart.
<span>So we wan't to know what happens during nuclear fusion where we have 12 atoms. Nuclear fusion is a nuclear process where 2 or more nuclei will form 1 or more different nuclei with a release of energy. So if we start with 12 atoms, the most likely result will be 6 atoms. </span>
b) in a direction that makes its potential energy decrease.
Explanation:
As the electric field has the direction that would take a positive test charge under its sole influence, the positive test charge, will have an increase in its kinetic energy.
Due to the conservation of energy, in absence of non-conservative forces, this increment must be equal and opposite to the change in electric potential energy, which will be always negative, independent of the sign of the charge.
