A ball is released from the top of a cliff; it hits the ground3.1seconds later. Assuming the ball is a free falling object, how many meters is the cliff above the ground below? (Useg= 9.8 m/s2.Express your answer to one decimal point.)
The velocity vs. time curve of an object is an increasing straight line. You observe that when the time is 1 second, the velocity is equal to 2 m/s, and when the time is 4 seconds, the velocity is 26 m/s. What is the acceleration of the object? (Express your answer to one decimal point.)
What is the magnitude of the acceleration of a modified Atwood machine if the mass of the cart is 2 kg and the hanging mass is 7 kg? (Use g= 9.8 m/s2. Express your answer to one decimal point.)