Question

A 3.00-kg object is initially moving northward at 15.0 m/s. Then a force of 15.0 N, toward the east, acts on it for 2.70 s.

At the end of the 2.70 s, what is the magnitude of the object’s final velocity?

Answer 1

To find the magnitude of the object's final velocity, calculate the change in velocity caused by the force using Newton's second law and equation of motion. Plugging in the given values, we find that the object's final velocity is approximately 28.5 m/s.

Step-by-step explanation:

To find the magnitude of the object's final velocity, we need to calculate the change in velocity caused by the force acting on it. The force is acting towards the east, so it will change the object's initial northward velocity.

First, we calculate the change in velocity caused by the force using Newton's second law: F = ma. Rearranging the formula to solve for acceleration, we get a = F/m.

Plugging in the values, we get a = 15 N / 3.00 kg = 5 m/s².

Next, we calculate the change in velocity caused by the force using the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time.

Plugging in the values, we get v = 15 m/s + (5 m/s²)(2.70 s). Solving the equation, we find v ≈ 28.5 m/s.

Answer 2

A 3.00-kg object is initially moving northward at 15.0 m/s. Then a force of 15.0 N, toward the east, acts on it for 2.70 s. At the end of the 2.70 s, what is magnitude of the object's final velocity? m/s A 3.00-kg object is initially moving northward at 15.0 m/s. Then a force of 15.0 N, toward the east, acts on it for 2.70 s. What is the direction of the final velocity? Enter the angle in degrees where positive indicates north of east and negative indicates south of east. Required information A 3.00-kg object is initially moving northward at 15.0 m/s. Then a force of 15.0 N, toward the east, acts on it for 2.70 s. What is the change in momentum during the 2.70 s? Take ty to be north and +x to be east. Enter a positive answer if the change in momentum is toward east and a negative answer if the change in momentum is toward west. kg-m/s