The net force on the cart is
Force = (mass) x (acceleration) .
We know the mass = 1.5 kilogram, but we need to
calculate the acceleration.
Acceleration = (change in speed) / (time for the change)
Change in speed = (ending speed) minus (beginning speed)
= ( 0 ) - ( 2 m/s ) = -2 m/s
Acceleration = (change in speed) / (time for the change)
= ( -2 m/s ) / (3 sec)
= - 2/3 m/s² .
Finally ... Net force = (mass) x (acceleration)
= (1.5 kilogram) x ( - 2/3 m/s²)
= ( - 3/2 x 2/3 ) (kg-m/s²)
= - 1 newton .
The negative sign on the force means the force is applied
opposite to the direction the cart is moving. That gives
negative acceleration (slowing down), and the cart
eventually stops.
Answer: D. All of the choices
<span>2 Nitrogen, 4 Hydrogen, 3 Oxygen
9 atoms per molecule.
NH4, ammonium (not to be confused with ammonia NH3) is a 1+ ion and NO3 is 1-.
</span>
That's going to depend on the initial velocity, and how it changes
or doesn't change during the 2.6 seconds. I've read the question,
and Im pretty sure you didn't tell us any of that.
Answer:
1 m/s^2
Explanation:
V = U + at
20 = 15 + a(5)
5a = 5
acceleration = <u>1 m/s^2</u>
