You throw a rock directly upward with initial speed vo. It leaves your hand at height h, rises, stops, and reverses direction. As the rock falls downward past height h, which of the following statements is true? Ignore air resistance. The speed of the rock is less than vo. The speed of the rock is equal to vo. The speed of the rock is greater than vo. There is not enough information to tell.

A student who aspires to ace his quiz in Phys134 went to a wishing welI. He dropped his first 10-peso coin and made a quick wish. Two seconds after he dropped his first coin, he threw another 10-peso coin vertically downward with a speed of 30m/s. How long will it take the second coin to overtake the first? * 3.8 s 1.9 s 2.9 s The second coin will never overtake the first coin

A ball is thrown straight down with an initial speed of 2.0 m/s from a height of 15 m. What is the position of the ball after 3.0 s, in meters? Use g = 9.8 m/s2. Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement

A distance of 90 meters separates two jetskis at Virginia Beach. Starting at rest, the jetskis accelerate at a constant rate of 0.7 m/s² towards each other. Starting at a midpoint between the two jetskis, a porpoise is seen swimming from one jetski to the other at a constant speed of 18 m/s. The porpoise continues swimming back and forth between the jetskis until they crash together. What is the total distance the porpoise travelled? 158.7 You are given the initial velocity Vo, acceleration a and the distance Ay. You have the speed of the porpoise, so you are looking for time. Use the equation that corresponds to these variables. meters Submit Answer Incorrect. Tries 1/2 Previous Tries Esc what is the speed of the jetskis when they crash together? m/s Submit Answer Tries 0/2 Post Discussion 39°F Wintry mix F3 F4 F5 F6 A F7 OL FB & F9 * FIO ► FII 99+ 31 F12 Ser Lk PriSc SysRa Pause Break Del Backspace ^o@d Pg Up Send Feedback Pg Dn 9:48 PM 2/12/2023 End

A rocket, initially at rest on the ground, accelerates straight upward with constant net acceleration, B, from time t=0 until t=T1, at which time the fuel is exhausted. Neglect air resistance and assume that the rocket stays close enough to the ground that the acceleration due to gravity (after the rocket engine stops) is given by g. a) Find the maximum height, H, that the rocket reaches above the ground. b) If the rocket's net acceleration, B, is equal to 1.0g, find an expression for the total time, Tmax, that the rocket is in the air (i.e. from liftoff until it hits the ground) in terms of T1. You do not need to solve your expression numerically but simplify it as much as possible.

A scooter begins at rest at t0=0.0s. The scooter starts moving, and eventually covers a distance d=886m in a time tf=176s. In a coordinate system with north being the positive x direction, the scooter's motion is towards the north. 1)What was the scooter's average speed, in meters per second, during this period?  2)What was the scooter's displacement, in meters, in the northern direction during this period?  3)What was the scooter's average velocity, in meters per second, in the northern direction during this period ?  4)A second scooter begins traveling from rest at  t0=0.0s  and stops at  t′f=176s. If this scooter's final velocity at  t′fwas  12.0m/s , then what was this scooter's average acceleration, in meters per squared second, in the northern direction?

A rock is tossed straight up with a speed of 25 m/s. When it returns, it falls into a hole 11 m deep. 1) What is the rock's velocity as it hits the bottom of the hole? Express your answer in meters per second. Enter positive value if the velocity is upward and negative value if the velocity is downward. 2) How long is the rock in the air, from the instant it is released until it hits the bottom of the hole? Express your answer in seconds.

7. A student throws a water balloon vertically downward from the top of a building. The balloon leaves the thrower's hand with a speed of 12m/s (a) What is its speed after falling freely for 1.5 s? (b) How far does it fall in 1.5 s? (c) What is the magnitude of its velocity after falling 10.0 m?

Two cars are heading towards one another. Car A is moving with an acceleration of aA = 14 m/s2. Car B is moving with an acceleration of aB = -15 m/s2. The cars are initially at rest and separated by a distance d = 2300 m on the x-axis. At what time in seconds do the cars meet? Now assume that both cars start with an initial velocity. Car A's initial velocity is v0A = 26 m/s and Car B's initial velocity is vB = -26 m/s. At what time, t2 in seconds, do they meet?