3. A car comes to a complete stop from an initial speed of 50 mph in a distance of 100 ft. With the same constant acceleration, what would be the stopping distances from an initial speed of 70 mph. Set your own variables for each parameter as you see fit.
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- Show complete solutions. Please draw a diagram. A motorbike has a constant speed of 5.00 m/s along a straight line from point A to point B and then back along the line from B to A at a constant speed of 3.00 m/s. A) What is the average speed over the entire trip? B) What is the average velocity over the entire trip?Calculate the standard deviation for these speeds of city traffic: 10 km/hr, 15 km/hr, 35 km/hr, 40 km/hr, 30 km/hr. Express your answers in the proper units of measurement and round to the nearest whole number.A boat has an initial speed of 12 ft/s . It then increases its speed along a circular path of radius ρ = 80 ft at the rate of v˙=(1.7s)ft/s2, where s is in feet. Determine the time needed for the boat to travel s = 80 ft .Express your answer to three significant figures and include the appropriate units.
- A motorcyclist travels along a straight road. His velocity is shown in the v-t graph. A) Construct the s-t graph B) What is the total distance travelled?If it takes a bicyclist 25 seconds to reach a speed of 10 km/h from rest, what is her acceleration? For the next 10 minutes, she moves at the constant speed of 10 km/h, and at this time, she applies her brakes, and the bicycle decelerates to a full stop in 5 seconds. What is the total distance travelled by the bicyclist? Determine the average speed of the cyclist during the first 25 seconds, 620 seconds, and 625 seconds.The figure shows a train traveling at a constant uniform velocity of 75 kph and a car travelling at a speed of 36 kph towards point 0. A. Which of the following gives the nearest value of the acceleration of the car, if the car reaches point 0, 10 seconds ahead than that of the train. B. If the train moves at a uniform velocity, which of the following gives nearest value of the required time for the train to reach the point 0. C. Using the acceleration computed, which of the following gives the value of the velocity of the car at the collision point.
- A usual football tryout involves a player running a 40-yard dash. If a particular player finishes the dash in 4.25 seconds while reaching his maximum speed at the first 16 yard mark with a constant acceleration and then maintains that speed for the remainder of the run, determine this person’s acceleration over the first 16 yard, his maximum speed and how long he accelerated. Set your own variables as you see fit. Show COMPLETE STEP BY STEP SOLUTION and necessary FIGURES.A boat has an initial speed of 12 ft/s . It then increases its speed along a circular path of radius ρ = 80 ft at the rate of v˙=(1.7s)ft/s2, where s is in feet. Determine the time needed for the boat to travel s = 80 ft .Express your answer to three significant figures and include the appropriate units. THE ANSWER IS NOT (1 second)A brand new Mercedes Benz is travelling at a highway with a speed of 40 mph and accelerates to double its speed in just 10 seconds. How far (in meters) did the car travel during the time it accelerated? (Note. 1 mile = 1069 meters)explanation not needed
- A car starts from rest and accelerates to a speed of 90 km/h in 20 seconds. The acceleration during this period is constant. For the next 20 minutes the car moves with the constant speed of 90 km/h. At this time the driver of the car applies the brake and thecar decelerates to a full stop in 10 seconds. The variation of the speed of the car with time is shown in the accompanying diagram. Determine the total distance traveled by the car and the average speed of the car over this distance.How far does Johnson's sports car move while it's speed increases uniformly from 15mph to 45mph in 20 seconds? Draw a graphA light train made up of two cars is traveling at a speed of (90 + a) km/h where a =7 when the brakes are applied to both cars. Knowing that car A has a mass of 25000 kg and car B has a mass of 20000 kg, and that the braking force is 30 kN on each car, as shown in Figure Q1 (a). Determine the distance travelled by the train before it comes to a stop