Question

Class Management I Help Practice Problems 2: 1-D Motion Begin Date: 9/1/2016 12:00:00 AM Due Date: 5/4/2017 12:00:00 AM End Date: 5/4/2017 12:00:00 AM (10%) Problem 4: A ball is thrown upward from the ground with in al velocity vi m/s and ultimately reaches height o h above e ground. Neglect air resistance. Otheexpertta.com 8% Part a) What is the acceleration of the ball when it is in the air, in m/s. 8% Part (b) What is the velocity of the ball, when it reaches the top of its trajectory, in m/s? Grade Summary Deductions 0% Potential 100% Submissions Attempts remaining: 3 cotano a acOS (490 per attempt detailed view tanh() cotanh() Degrees Radians Hint Submit Hints 4% deduction per hint. Hints remaining Feedback 5% deduction per feedback. 8% Part (c) Write an expression for the maximum height, h, the ball reaches in terms of vA vis and a 8% Part (d) Calculate the numerical value of h, in meters 8% Part (e) Write an expression for the time it takes for the ball to travel from the ground to the top, 4t, in terms of v and a 8% Part f Calculate the numerical value of 41 in seconds 8% Part 1y, in meters, of the ball going through its entire motion traveling from the ground to the top What is the total displacement and then falling back to the ground? 8% Part b) Write an expression for the total time of Ilight or the ball; that is, the time irom when it is launched lo when it lands back on the ground. Express this time, 4lt, in terms of vi and a 8% Part Calculate the numerical value of 4t, in seconds 8% Part i) Express 4t in terms of 41 calcu. ed above, by comparing the result of Pa (i) with the result of Part (f 8% Part (k) Express the velocity of the ball right before it hits the ground, v n terms of vis 4tt and a 8% Part Express vi terms of v fin

Answer 1

Part A)

Acceleration will be equal to acceleration due to gravity and that too in downward direction

So, a=g= -10m/s^2.

Part B)

Velocity at the highest point is always zero. So, Vf = 0 m/s.

Part C)

Part D)

Part E)

Part F)

Part G)

Total displacemnet is zero as final and initial positions are same.

Part H)

Part I)

Part J)

Part K)

Part L)

in vector form.

in magnitude.