Astudent 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

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.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west