A ball is dropped in a stationary elevator and hits the floor in 0.65 s. How long does it take for the ball to hit the floor if the elevator is moving down with a constant speed of 3.0 m/s. Consider g = 9.8 m/s². Select one: O a. 1.16 s O b. 1.02 s O c. 0.76 s O d. 0.84 s
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- On planet #3, you fire a projectile horizontally from the edge of a vertical cliff 69.9 m above the ground, with an initial speed of 59.8 m/s. The projectile lands 67.2 m away from the base of the cliff. What is the value of g for planet #3? a. 183.63 m/s^2 b. 110.71 m/s^2 c. 55.35 m/s^2 d. 49.18 m/s^2 2. On planet #4, you fire a projectile from the ground at an initial speed of 20.0 m/s at an angle of 43.1 degrees above the horizontal. The projectile lands 78.7 m away from the launch point. What is the value of g for planet #4? a. 3.5 m/s^2 b. 309.0 m/s^2 c. 211.6 m/s^2 d. 5.1 m/s^2A frictionless rolling cart has an initial velocity of 10.0 m/s as it climbs up anincline of 24 degrees .a. What is the cart’s height above the ground when it monetarily comes to astop on the ramp?b. At that instant, how far has it travelled along the ramp?7. At t = 0, a particle leaves the origin with avelocity of u 9.0m/s j the xy plane with an acceleration of a 2.0i- 4.0j m/s2. At the instant the x coordinate of the particle is 15 m, what is the speed of the particle? A. 10 m/s B. 16 m/s C. 12 m/s D. 14 m/s E. 26 m/s maximum height above ch se, 2019. Departme
- 24 ee31.5 Or S wws bom the dt of 4m (e 3. Os the planet Mars, and ohect s thews om the ground and of 3. Whet is the wht is the maimum heighe wd wwle ae und snd lands the ground is i fight a total speed of the Wht is the spesd of the peopecile at the sop of its pathTwo spheres are launched horizontally from a 1.2 mm -high table. Sphere AA is launched with an initial speed of 4.5 m/sm/s . Sphere BB is launched with an initial speed of 2.5 m/sm/s . A. What is the time for the sphere AA to hit the floor? Express your answer using two significant figures. B. What is the time for the sphere BB to hit the floor? Express your answer using two significant figures.An Alaskan rescue plane drops a package of emergency rations to a stranded party of explorers. If the plane is traveling east at 40 m/s and is 100 meters above the ground: a.Using the release point as the origin, find the time it takes for the package to reach the ground once released. b.How far east of the release point does the package strike the ground? Also, What is the speed of the package as it hits the ground? c.With what angle (below the horizontal) does the pack strike the ground? Please show work for all of the parts.
- Emily throws a soccer ball out of her dorm window to Allison, who is waiting below to catch it. Emily throws the ball at an angle of 30° below horizontal with a speed of 12 m/s, and Allison catches it 2.5 s later. What is the vertical distance between Emily and Allison, in meters? Use g = 10.0 m/s2.student throws a heavy red ball horizontally from a balcony of a tall building with aninitial speed v0. At the same time, a second student throws a lighter blue ball horizontally fromthe same balcony with an initial speed v0 /2. Ignoring air resistance, which of the followingstatements must be true?a. The red ball hits the ground with the greater speed.b. Both balls hit the ground with the same vertical velocity component.c. Both balls hit the ground with the same angle of impactd. The balls reach the ground at the same instant. More than one of the statements can be true.We know that the moon Callisto revolves around Jupiter during a period of 17.0 days.17.0 days. The average distance from the center of Jupiter to the center of Callisto is 1.95×109 m.1.95×109 m. What is the acceleration ?a of Callisto due to its motion around Jupiter?
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