Q: The height h (in feet) of an object falling from a tall building is given by the function h(t)=144-16t^2, where t is the time elapsed in seconds. a. After how many seconds does the object strike the ground? b. What is the average velocity of the object from t=0 until it hits the ground? c. Find the instantaneous velocity of the object after ...Velocity vs. Time for a Cart 20. 15 10. 5 -15 -20. 01234567 Time (s) What is the magnitude of the change in momentum of the cart-þetween t = O and t = 3 seconds? (A) joules (B) watts (C) kg-m/s (D)N-m 2.1fthe direction of the momentum of an object is west, the direction of the velocity of the object is (A) north (B) south (C) east (D)west
Mar 23, 2020 · The object accelerates and is now moving north at 15 meters per second. The object has been accelerated. 5.- When propelling the skateboard with our foot, there is a change in acceleration. Let’s go faster. What is average acceleration in physics? The average acceleration of a body given in the above equation is a during time t. At time t, the position of a body moving along the s-axis is s = t^3 - 6t^2 + 9t m. A. Find the body's acceleration each time the velocity is zero. B. Find the body's speed each time the accelaration is zero. C. Find the total distance traveled by the body from t = 0 to t = 2.
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