Answer:
Option A. 3 m/s
Step-by-step explanation:
From the question given above, the following data were obtained:
Mass of cart = 4 Kg
Momentum of cart = 12 kg•m/s.
Velocity of cart =?
Momentum is simply defined as the product of mass and velocity. Mathematically, it is expressed as:
Momentum = mass × velocity
Thus, we can obtain the velocity of the cart by using the above equation as illustrated below:
Mass of cart = 4 Kg
Momentum of cart = 12 kg•m/s.
Velocity of cart =?
Momentum = mass × velocity
12 = 4 × velocity
Divide both side by 4
Velocity of cart = 12 / 4
Velocity of cart = 3 m/s
Therefore, the velocity of the cart is 3 m/s