A cannonball is launched from ground level with an initial speed of vo straight up in the air What will be the speed of the cannonball when it achieves a vertical height h and is still moving upward? А. Vvỏ + 2gh 2gh В. vỏ – 2gh С. D. 2gh O E. vở - 2gh Е.

A ball is dropped from a height of 4m above the ground. The velocity of the ball when reaching the ground is a. 6.26 m/s b. -9.8 m/s c. 8.85 m/s O d. -8.85 m/s

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2. A jet plane has a takeoff speed of vtakeoff = 73 m/s and can move along the runway at an average acceleration of 2.4 m/s2. The runway is 1.2 km. Write out the 3 Kinetic equations. a. b. Write out the values of initial position, initial velocity, and acceleration. How many seconds will it take for the plane to reach takeoff speed? с. d. How far will the plane have to travel to get to takeoff speed? will the plane be able to get to take off before it gets to the end of the runway? е.

The velocity of a particle is given by v = 29t²-88t - 196, where v is in feet per second and t is in seconds. Plot the velocity v and acceleration a versus time for the first 4 seconds of motion. After you have the plots, answer the questions as a check on your work. -1 Questions: + 0 + 1 When t = 0.5 sec, V = 2 i When t = 3.3 sec, V = i + 3 +s, ft or m When the acceleration is zero, the velocity is i ft/sec, a = ft/sec, a = i i ft/sec. ft/sec² ft/sec²

The Hint The position of a particle moving along the x axis is given by x = (21 +22t+8t²) m, where t is in s. What is the instantaneous velocity of the particle at t= 5.0 s ? a. b. C. e. f. 10.2m/s -2.0 m/s -82.0m/s 331 m/s 102m/s -6.0 m/s

anb wers the question. Place your answer in the blank 2 1. Which of the following is not a unit of velocity? A. kg/s B, km/s C. m/h D. m/s . Bernice can run 100 m in 15.2 s. Correct to one decimal place, what is her average velocity in m/s? A. 6.0 m/s B. 6.2 m/s C. 6.4 m/s D. 6.6 m/s 3. Which of the following is the formula for velocity? A. V dt B. V=d C. v=L D. v=- dt

At the Earth's surface, a projectile is launched straight up at a speed of 7.5 km/s. To what height will it rise? Ignore air resistance. 2.87e+06 Your response differs from the correct answer by more than 10%. Double check your calculations. m

A car is moving along a straight road with an initial velocity of v, =13 m/s and an acceleration, a=2 m/s2. What is the distance traveled (in m) after t=4 s? A. None B. 204 C. 136 D. 68 E. 272 OUOD O