229k views
2 votes
A ball rolls off a table and hits the ground 0.49 seconds later. The ball travels 1.1 m forwards,

a) What is the final velocity (v final) in the x-direction?
b) What is the final velocity (v final) in the y-direction?
c) What is the final velocity (v final) and the angle of impact?

1 Answer

3 votes

Final answer:

a) The final velocity in the x-direction is 1.92 m/s. b) The final velocity in the y-direction is 2.29 m/s. c) The final velocity is 3.02 m/s and the angle of impact is 52.09°.

Step-by-step explanation:

a) The final velocity in the x-direction can be calculated using the formula v_x = v_initial * cos(theta), where v_initial is the initial velocity and theta is the angle of impact. In this case, the initial velocity is 3.00 m/s and the angle of impact is 50°. Plugging in these values, we get v_x = 3.00 m/s * cos(50°) = 1.92 m/s. Therefore, the final velocity in the x-direction is 1.92 m/s.

b) The final velocity in the y-direction can be calculated using the formula v_y = v_initial * sin(theta), where v_initial is the initial velocity and theta is the angle of impact. Plugging in the values, we get v_y = 3.00 m/s * sin(50°) = 2.29 m/s. Therefore, the final velocity in the y-direction is 2.29 m/s.

c) The final velocity can be calculated using the Pythagorean theorem: v_final = sqrt((v_x^2) + (v_y^2)). Plugging in the values, we get v_final = sqrt((1.92 m/s)^2 + (2.29 m/s)^2) = 3.02 m/s. The angle of impact can be calculated using the inverse tangent function: theta = arctan(v_y / v_x). Plugging in the values, we get theta = arctan(2.29 m/s / 1.92 m/s) = 52.09°. Therefore, the final velocity is 3.02 m/s and the angle of impact is 52.09°.

User Sajith Mantharath
by
7.8k points