3. 2.3 Ball and Brick 1 / 1 point 3a A 0.2 kg mass is attached to a spring that is compressed against a heavy brick. The mass begins at the origin of a coordinate system as shown (Note that +y is pointing down). Att = 0 s, the spring is released and the mass and brick are allowed to fall. The mass accelerates at 3.2 m/s' due to the spring and 9.8 m/s due to gravity. -> + x What is the displacement vector of the mass after 2.5 s? Give both components below in m. 10 Correct The acceleration in the x-direction is 3.2 m/s', so aftert = 2.5 s, x = ; x 3.2 x 2.52 = 10m. 4. 3bj: 1 / 1 point 30.625 Correct The acceleration in the y-direction is 9.8 m/s', so after t = 2.5 s, y = 7 \\*9.8\\*2.52 = 30.6 m. Also note that in the figure the y-direction is pointing down, so the y-displacement should be positive. 5. 3c What is the direction of the total acceleration at t = 0 s and t = 2.5 s? Give your answer in degrees below the 0 / 1 point x-axis (i.e. the number should be positive. t = 0s No answer X) Incorrect The answer you gave is not a number. 6. 3dt = 2.5s 0 / 1 point No answer X) Incorrect The answer you gave is not a number