A ball is thrown up in the sky. After reaching a height, the ball falls back. What can be said about the average velocity? a) It is non zero b) It is zero c) It is greater than zero d) It is less than zero
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A ball is thrown up in the sky. After reaching a height, the ball falls back. What can be said about the average velocity?
a) It is non zero
b) It is zero
c) It is greater than zero
d) It is less than zero
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Solved in 2 steps
- Ce A webassign.net/web/Student/Assignment-Responses/submit?dep=27519463&tags=autosave#question3572106_11 (h) 0.0207 3 DETAILS A walker covers a distance of 2.2 km in a time of 32 minutes. What is the average speed of the walker for this distance in km/h? km/h 5. DETAILS A tortoise and a hare cover the same distance in a race. The hare goes very fast for brief intervals, but stops frequently, whereas the t hare. (a) Which of the two racers has the greater average speed over the duration of the race? OThe tortoise has the greater average speed since he was the winner. The hare has the greater average speed since he can go faster. Their average speeds are equal. OIt's impossible to determine who had the greater average speed without collecting data. (b) Which of the two racers is likely to reach the greatest instantaneous speed during the race? OThe tortoise has the greater instantaneous speed since he was the winner. OThe hare has the greater instantaneous speed since he can go faster.Arthur and Betty start walking towards each other when they are 100 m apart. Arthur walks with a speed of 3.2 m/s and Betty with a speed of 3.1 m/s. How long does it take to meet? Write the answer using 3 significant figuresQuestion A1 An object slides off a frictionless, horizontal table from a height of 1.40 m above the floor. It strikes the floor a distance of 1.88 m from the base of the table. a) Calculate the speed with which the object leaves the table. b) Calculate the velocity (magnitude and direction) of the object just before it strikes the floor.
- A student fires a cannonball vertically upwards with a speed of 39.0m/s. Determine all unknowns and answer the following questions. Neglect drag and the initial height and horizontal motion of the cannonball. What was the cannonball's maximum height? unit How long did the cannonball rise? unit What was the cannonball's total flight time? unit check answers cannot be de Unit 12: forces and motion review, one-dimensional motion problems Desmos Scientific Online CalculatorIf you throw up a ball, after 4 seconds it return back to your hands, what is the height of this ball from your hands to the highest position. (Assume g=10m.s-²) 18 O 15 metres O 20 metres O 25 metres 30 metres Vo hA bucket is thrown vertically down a well with a speed of 4.24 m/s, it takes 1.96 s for the bucket to reach the bottom of the well What is the height of the well?
- Problem #8If a particle increases in speed at a constant rate as it moves in the positive direction along an x axis, which of the following describes a plot of its velocity versus time? O plot has constant positive slope plot has constant negative slope O plot has zero slopeA 20 N stone is thrown vertically upward from the ground. It is observed that, when it is 15 m above the ground, it travels with a velocity of 25 m / s upwards. What will its speed be when it is thrown? A) 30.31 m/sB) 15.16 m/sC) 18.19 m/sD) 319 m/s
- 2- A) Estimate how long it took King Kong to fall straight down from the top of the building (475 mm high). Express your answer to three significant figures and include the appropriate units. B) Estimate his speed just before "landing."6. A ball is thrown upward with a velocity of 4.5 m/s. Its speed and the magnitude of its acceleration at the highest point (a) are both equal to zero (b) are given by 9.81 m/s and 0 m/s², respectively (c) are given by 0 m/s and 9.81 m/s², respectively (d) cannot be predicted unless the height is known Answer: 7. Which of the following statements about a projectile is not true? Assume that the air resistance is negligible. (a) Its motion is in two dimensions. (b) The only acceleration is in the vertical direction. (c) Its velocity in the horizontal direction remains the same throughout the flight. (d) The velocity at the highest point of its trajectory is zero. Answer:v(m/s) The opposite figure shows the relationship between speed and 3 time. an object is in motion, the distance traveled by the object t(s) during (6s) in meters is equal to: 3 6