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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.
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- Songlu loves Vin Diesel and has watched every Fast and Furious movie, even Tokyo Drift! To get Vin Diesel's attention on TicTok she decides to redo one of his movie stunts. Songlu rents a Porsche 911 convertible, pays the extra $10 per day for insurance, and then drives to Big Bear. When she gets there, Songlu puts on her parachute and drives at a speed of 215 mph (96.1 m/s) off of a 450 m tall cliff, jumping out mid air so she can use her parachute on the way down. How far does Rubbab's rented Porsche 911 land from the base of the cliff? O 832 m O 614 m O 1,230 m O 921 mLately, Jason has been taking drivers' ed so that he can get his license. However, he's also been taking physics, and so he wonders what his acceleration is, when he drives on a circular path in an empty parking lot near Peachtree Mall with diameter 78.0 m, if he is driving at a constant speed of 23.0 m/s. What is his acceleration? O 66.1 m/s² 13.6 m/s2 O 0.590 m/s² O 1.70 m/s² O 0 m/s²A child is sitting on the outer edge of a merry-go-round that is 18m in diameter. If the merry-go-round makes 4.0 rev/min, what is the velocity of the child in m/s? 3.8 m/s O2.7 m/s 0.6 m/s O 7.6 m/s
- An object is dropped in an unknown planet from height 50 m, it reaches the ground in 2 s . The acceleration due to gravity in this unknown planet is __________. a. g = 20 m/ s^2 b. g = 15 m/ s^2 c. g = 25 m/ s^2 d. g = 30 m/ s^2Spring Gun: A spring gun can launch a projectile with a speed of 12.21 m/s 1.8m high, and the projectile travels a distance of 12.90m before it hits the ground. The lab is on an asteroid. What is the acceleration due to gravity on this asteroid?A classic wooden coaster has cars that go down a big first hill, gaining speed. The cars then ascend a second hill with a slope of 30°. If the cars are going 25 m/s at the bottom and it takes them 2.0 s to climb this hill, how fast are they going at the top?
- A runner is going 8 m/s around a curved section of track that has a radius of 54 m. What is the runner's acceleration? m/s? radially inwardDifferent animals have very different capacities for running. A horse can maintain a top speed of 20 m/s for a long distance but has a maximum acceleration of only 6.0 m/s2, half what a good human sprinter can achieve with a block to push against. Greyhounds, dogs especially bred for feats of running, have a top speed of 17 m/s, but their acceleration is much greater than that of the horse. Greyhounds are particularly adept at turning corners at a run. A greyhound on a racetrack turns a corner at a constant speed of 15 m/s with an acceleration of 7.1 m/s2. What is the radius of the turn?A. 40 m B. 30 mC. 20 m D. 10 mEntrance and exit ramps for freeways are often circular stretches of road. As you go around one at a constant speed, you will experience a constant acceleration. Suppose you drive through an entrance ramp at a modest speed and your acceleration is 3.0 m/s2. What will be the acceleration if you double your speed?
- Different animals have very different capacities for running. A horse can maintain a top speed of 20 m/s for a long distance but has a maximum acceleration of only 6.0 m/s2, half what a good human sprinter can achieve with a block to push against. Greyhounds, dogs especially bred for feats of running, have a top speed of 17 m/s, but their acceleration is much greater than that of the horse. Greyhounds are particularly adept at turning corners at a run. If a horse starts from rest and accelerates at the maximum value until reaching its top speed, how far does it run, to the nearest 10 m?A. 40 m B. 30 mC. 20 m D. 10 mA high-performance sports car can go from 0 to 100 mph (44.7 m/s) in 7.9s. a) What is the car's average acceleration? b) The same car can come to a complete stop from 30 m/s in about 3.2 s. What is its average acceleration?7. A man runs around a circular track of 800 meters radius for 30 seconds, starting at a point directly to the right of the center and goes in a counterclockwise manner. He goes 5 meters per second for the first 15 seconds, runs 90 meters for the next 6 seconds and then 180 meters for the rest of the course. (a) What was his average speed? (b) What was his average velocity? (c) What was his displacement from the starting point? (d) What wll be hls total displacement upon returning to the starting polnt.