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- I need help on this question?1. A train leaves the station on a 50 km commute. The train must make a 60-second stopevery 1.0 km to pick up and drop off passengers. The train accelerates at 2.0 m/s2, then cruises at90 km/h, and then decelerates at 5.0 m/s2 between stops.(a.} How many stops does the train make?(b.} How long does it take for the train to get from one stop to the next?(c.} What is the total time for the entire commute?a person travels by car from city to another with a different constant speeds between pairs of cities. She drives for 40.0 min at 85.0km/h, 8.0min at 50.0km/h, 50.0min at 30.0km/h and dpends 50min eating lunch and buying gas. A)determine the average speed for the trip in km/h B)determine the distance between the initial and final cities along the route in km.
- 4. A car company claims that its car can accelerate from rest to a speed of 28.0 m/s in 20.0 s. Find the average acceleration of the car and the distance it goes in this time.5. DETERMINE THE STOPPING DISTANCES FOR A CAR WITH AN INITIAL SPEED OF 95km/h AND A HUMAN REACTION TIME OF 1.0 s, FOR AN ACCELERATION OF............. (A) a=-4.0 m/s², (B) a= -8.0 m/s² (Hint: First, convert 95 km/h to m/s)13. A boy walks 155 m at a speed of 3.5 m/s and then runs for 100 m at 8.2 m/s along a straight line. Calculate his average velocity. 14.A boat can accelerate from 2 to 21 km/h in 10 s. How far has the boat travelled in this time?
- 3. Jakub is driving at 25.0 m/s when he sees the speed limit so he slows down (decelerates) at -4.0 m/s2 for 4.0 seconds. a. Calculate Jakub's final speed. Ax D V = V=A small rock is thrown vertically upward with a speed of 29.0 m/s from the edge of the roof of a 33.0 m tall building. The rock doesn't hit the building on its way back down and lands in the street below. Ignore air resistance. A) Whats the speed of the rock just before it hits the street B) How much time elapses from when the rock is thrown until it hits the street11. A Lamborghini accelerates uniformly from rest to a speed of 100 m/s over a distance of 50 m. Determine the acceleration of the of the sports car. 12. SPACEX MARS Rocket-powered sleds are used to test the human response to acceleration. If a rocket- powered sled is accelerated to a speed of 666 m/s in 6.66 seconds, then what is the acceleration and what is the distance that the sled travels? 13. A JET accelerates down a runway at 6.90 m/s²for 30.31 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
- 2. Frankie and Rosie take a trip in a car from one town to the next. During the trip several different average speeds are driven based on traffic. Frankie drives for 16.4 miles at 22.0 m/s, 14.5 miles at 26.0 m/s, and 30.2 miles at 18.0 m/s. As part of this trip Frankie and Rosie stop to eat dinner at a diner for about 35.0 minutes. Calculate the total time for the entire trip in minutes. o straight portion of a track2. An object that is initially traveling with a velocity of 20.0 m/s i is subject to a constant acceleration at t= 0. a) If the object moves a distance of 45.0 m in the x-direction over a time of 10.0 seconds, what is the constant acceleration of the object over that time?