A car goes around a curve while maintaining a constant speed. Does the car accelerate as it goes around the curve? It depends on the sharpness of the curve and speed of the car. Yes. No - its speed is constant.
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A car goes around a curve while maintaining a constant speed. Does the car accelerate as it goes around the curve?
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- A baseball is thrown up into the air, reaches a peak, then comes back down. At the very peak of its arc, what is the ball's acceleration? Explain your answer.1. A fairground ride spins its occupants inside a flying saucer-shaped container. If the horizontal circular path the riders follow has an 10 m radius, at how many revolutions per minute are the riders subjected to a centripetal acceleration equal to that of gravity? f= revs minWhat is the minimum radius at which an airplane flying at 300 m/s can make a U-turn if its centripetal acceleration is NOT to exceed 4 G's? (4 x the acceleration of gravity) 4.
- Falcons are excellent fliers that can reach very high speeds by diving nearly straight down. To pull out of such a dive, a falcon extends its wings and flies through a circular arc that redirects its motion. The forces on the falcon that control its motion are its weight and an upward lift force—like an airplane—due to the air flowing over its wings. At the bottom of the arc, as shown, a falcon can easily achieve an acceleration of 15 m/s2. A falcon starts from rest, does a free-fall dive from a height of 30 m, and then pulls out by flying in a circular arc of radius 50 m. Which segment of the motion has a higher acceleration?A. The free-fall diveB. The circular arcC. The two accelerations are equal.2-9) A fairgrounds ride spins its occupants inside a flying saucer-shaped container. If the horizontal circular path the riders follow has a 9.00 m radius, at how many revolutions per minute will the riders be subjected to a centripetal acceleration whose magnitude is 1.55 times that due to gravity? _____rev/min
- True or False. A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is 8 m/s2.Falcons are excellent fliers that can reach very high speeds by diving nearly straight down. To pull out of such a dive, a falcon extends its wings and flies through a circular arc that redirects its motion. The forces on the falcon that control its motion are its weight and an upward lift force—like an airplane—due to the air flowing over its wings. At the bottom of the arc, as shown, a falcon can easily achieve an acceleration of 15 m/s2. Suppose the falcon weighs 8.0 N and is turning with an acceleration of 15 m/s2 at the lowest point of the arc. What is the magnitude of the upward lift force at this instant?A. 8.0 N B. 12 NC. 16 N D. 20 NAt a certain instant, the magnitude of velocity and acceleration of a point shown below are V = 10.0 m/s and a = 46.9 m/s?. The acceleration is directed at an angle of 0 = 34.3° as shown in the figure. At this instant, find the radius of curvature of the path in meters. V m/s a m/s? -----
- 3. A coin is placed 12.0 cm from the axis of a rotating turntable of variable speed. When the speed of the turntable is slowly increased, the coin remains fixed on the turn table until a rate of 35.0 rpm is reached, at which point the coin slides off. (a) Find the speed of the coin just before it starts to slide. (b) What is the coin's acceleration just before it starts to slide? (magnitude and direction) (c) What is the source of the force that causes the coin to accelerate? (d) Find the coefficient of static friction between the coin and the turntable.it's urgentTo withstand "g-forces" of up to 10 g's, caused by suddenly pulling out of a steep dive, fighter jet pilots train on a "human centrifuge." 10 g's is an acceleration of 98 m/s². If the length of the centrifuge arm is 15.0 m, at what speed is the rider moving when she experiences 10 g's? Express your answer with the appropriate units.