10) A car starts from rest and in 30 seconds attains a speed of 50 m/s. Then, it travels at the same speed for 20 seconds. Find the total distance travelled, acceleration and distance travelled during acceleration.
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- Usually, Tony travels to Bunbury from Perth city in 2.50 hours. One day he increases his average speed by 12.0 km/h and takes 22.5 minutes less time to reach Bunbury. (a) What was his usual average speed? What was the distance travelled? (b) On the way he stopped at a rail crossing (6.00 m wide) and a train (total length 144m) decelerating at -0.585 ms2 just entered the crossing with a velocity of 13.7 m s¹. Sketch a diagram and find the minimum time for the last carriage of the train to clear the crossing.A car starts from 2.00 m/s and accelerates at 4.00 m/s2 for 6.0 s, it coasts for 5.00 s, and then slows down at a rate of 2.00 m/s2to a stop. How far has it traveled, in meters? Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.A car speeds past a policeman motorcycle at a constant speed. After 2 sec, the policeman begins to chase the car at an acceleration of 6.5 m/ s^2 until he reaches 110 km/hr. He reaches the car at 1.4 km. What speed was the car speeding at?
- (b) The velocity versus time graph for a car is shown below: Velocity (m/s) 15 10 10 15 Time (s) 20 25 (i) Describe the motion of the car along segments A, B and C on the graph. (ii) Calculate the total distance covered by the car. (iii) Sketch an acceleration versus time graph for the motion of the car.8) Bob can accelerate from rest to 12.0 M/s in a distance of 18.0 meters. Find average acceleration. 9) Find time for Bob to accelerate.When the legal speed limit for the New York Thruway was increased from 55 mi/h to 65 mi/h, how much time was saved by a motorist who drove the 463 km between his entrance and the New York City exit at the legal speed limit? Number Units
- 99. Subject:- Physics If the car's speed decreases at a constant rate from 64 mi/h to 50 mi/h in 3.0 s, what is the magnitude of its acceleration, assuming that it continues to move in a straight line? Express your answer in miles per hour squared. a = VG ΑΣΦ ? mi/h²59) A fireworks shell is accelerated from rest to a velocity of 65.0 m/s over a distance of 0.250 m. (a) Calculate the acceleration. (b) How long did the acceleration last?A car travels in a straight line for 5 h at aconstant speed of 53 km/h.What is its acceleration?Answer in units of m/s2
- 1) A bicycle travels 10.5 km in a in the first part of a race in 45.0 min. The cyclists travels 15.0 km in 70.0 min in the second half of the race. Calculate the average speed of the bicycle in km/hr.7) A cyclist moves at 11.0 m/s for 1.00 min and at 16.0 m/s for 2.00 min. Find the average velocity if the second part of the motion is (a) in the same direction as the first (hint, the answer is not 13.5 m/s), and (b) in the opposite direction.