Car and a delivery truck both start from rest and accelerate at the same rate . However, the car accelerates for twice the amount of time as the truck . What is the final speed of the car compared to the truck ?
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A Car and a delivery truck both start from rest and accelerate at the same rate . However, the car accelerates for twice the amount of time as the truck . What is the final speed of the car compared to the truck ?
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- A car traveling 89 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.81 m. a) What was the average acceleration of the driver during the collision? b) Express the answer in terms of g.Upon impact, bicycle helmets compress, thus lowering the potentially dangerous acceleration experienced by the head. A new kind of helmet uses an airbag that deploys from a pouch worn around the rider’s neck. In tests, a headform wearing the inflated airbag is dropped onto a rigid platform; the speed just before impact is 6.0 m/s. Upon impact, the bag compresses its full 12.0 cm thickness, slowing the headform to rest. What is the acceleration, in g’s, experienced by the headform? (An acceleration greater than 60g is considered especially dangerous.)You and a friend ride your bikes to a restaurant across town. Both of you start at the same instant from your house, you riding 10 m/s and your friend riding 12 m/s. During the trip your friend has a flat tire and that takes him 8 minutes to fix. He then continues the trip at the same speed of 12 m/s. If the distance to the restaurant is 10 km, who gets there first?
- 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. 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 mDifferent 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 jogger runs 10 km in 45 minutes, rests for 10 minutes, and then runs another 8 km in 1 hour. The average speed of the jogger over the entire run is A 12.41 km/h B 11.61 km/h C 10.29 km/h D 9 km/h E 9.39 km/h
- a cheetah and a gazelle are both stopped. The gazelle runs and accelerates so that it reaches a velocity of 20 m/s after 100m, then runs at a constant velocity of 20 m/s. The cheetah waits 3 seconds and accelerates at 2.5 m/s to reach a final velocity of 22 m/s and then travels down the road at 22 m/s. When does the cheetah catch the gazelle? How far do they travel?Two cars leave an intersection, one 17 minutes after the other. The first car, A, travels north at the speed of 50 km/h and the second car, B, travels west at a speed of 70 km/h. How fast are the cars separating from each other 55 minutes after the first car leaves the intersection? the answer is 85, but I am struggling on how to find that answerAs a technical engineer in the army, you are part of a team in charge of testing and commissioning a new tank recently purchased by the artillery. Field testing has revealed the following information: 1) The tank moves from rest to a speed of 70 ??/ℎ? in 10 seconds. 2) Using the breaking system, the tank is brought to a complete stop from a speed of 70 ??/ℎ? in 5 seconds. You are required to address all the questions below providing all calculations, graphs, and explanations as appropriate to back your answerFirst: Motion of the tank: a) Find the average driving acceleration of the tank. b) Calculate the average breaking acceleration of the tank. c) For parts (a) and b above parts report your answers in US Customary Units (mile/hr) so that the information could be shared with experts from the US. Second: Motion of the fired bomb: The tank is to be placed on a hill that is 1 km high above the ground. The enemy’s base is located at a horizontal distance of 10 km away and it is in a…
- A car is traveling on a straight, level road under wintry conditions. Seeing a patch of ice ahead of her, the driver of the car slams on her brakes and skids on dry pavement for 70 m, decelerating at 6.0 m/s2. Then she hits the icy patch and skids again. The car takes a duration of 85.0 s to come to rest during the second skid. If her initial speed was 50 m/s, what was the magnitude of the deceleration on the ice during the second skid. 1. Which of the following kinematic equations would you use to determine the velocity of the car after skidding on the dry pavement for 70 m? 2. Determine the velocity of the car after skidding on the dry pavement for 70 m. 3. Which of the following kinematic equations would you use to determine the deceleration of the car after skidding to a stop on the icy patch? 4. Determine the magnitude of the deceleration of the car after skidding to a stop on the icy patch.A car is traveling on a straight, level road under wintry conditions. Seeing a patch of ice ahead of her, the driver of the car slams on her brakes and skids on dry pavement for 70 m, decelerating at 6.0 m/s2. Then she hits the icy patch and skids again. The car takes a duration of 85.0 s to come to rest during the second skid. If her initial speed was 50 m/s, what was the magnitude of the deceleration on the ice during the second skid.A 1000kg helicopter hovers over a forest fire and starts to squirt water downward with a speed of 10m/s at a rate of 40kg/s. What is the initial upward acceleration on the helicopter when it first starts to release the water