A man walks on a straight road from his home to market 2.5 km away with a speed of 5 km/h. Finding the market closed, he instantly turns and walks back home with a speed of 7.5 km/h. what is the average speed and average velocity of the man over the interval of time 0 to 30 minutes.
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- A physics teacher walks 5 km East, 2.5 km South, 5 km West, and finally 2.5 km North. The entire motion lasted for 3 hours. Determine the average speed and the average velocity.A blue car travels down a straight road at a constant speed of 21.7 m/s. As they pass a red car, initially stopped on the side of the road, the red car speeds up at a rate of 2.12 m/s2. How much distance (in m) does the blue car travel before the red car overtakes the blue car?Sarah is standing when she sees a boy running towards her with constant velocity 6.0 m/s. When they are 200 m apart, Sarah starts running to meet him. She runs with a constant acceleration, and by the time they meet, Sarah is running at 7.0 m/s. How long, from the time Sarah begins moving, does it take for them to meet?
- In heavy rush-hour traffic, you drive in a straight line at 12 m/s for 1.5 minutes, then you have to stop for 3.5 minutes, and finally, you drive at 15 m/s for another 2.5 minutes. Plot a position-versus-time graph for this motion. Your plot should extend from t = 0 minutes to t = 7.5 minutes. Assume x=0 and t=0 at the start of your motion.At 5:11 p.m. in the highway and at the height of a town, a police patrol was traveling at a speed of 18.0 m / s towards the city, when the citizen's car approaches a speed of 94 mi / h towards the city. After a reaction time of 0.800 seconds, the police start chasing the citizen with an acceleration of 5.00 m / s2. Including the reaction time: (a) How long does it take for the police patrol to reach the citizen? (b) Indicate how far it reaches, from the moment the chase begins, and create a Position vs. time graph, showing the two movements (that of the citizen and the police patrol)A car has an initial velocity of 17.8 m/s (SOUTH). The car has an unknown acceleration for a time of 7.11 seconds, at which point the car has a final velocity of 4.20 m/s (NORTH). During this time what is the car's displacement?
- A car is traveling along a straight road at a velocity of +39.5 m/s when its engine cuts out. For the next 2.81 seconds, the car slows down, and its average acceleration is a,. For the next 5.65 seconds, the car slows down further, and its average acceleration is ₂. The velocity of the car at the end of the 8.46-second period is +28.6 m/s. The ratio of the average acceleration values is ā,/₂ = 1.78. Find the velocity of the car at the end of the initial 2.81-second interval. 2A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 5.11 m/s. The car is a distance d away. The bear is 34.0 m behind the tourist and running at 7.01 m/s. Both the bear and the tourist are running with constant velocity. What is the maximum possible value for d in meters for the tourist reaches the car safely?A pickup truck is traveling at 30.0 m/s. The driver of the truck applies the brakes and gives the truck a uniform deceleration of 6.50 m/s2² while it travels 20.0 m. What is the speed of the truck in m/s at the end of this distance?
- A rock parrot (Neophema petrophila) flies 37 m south and then 49 m west, in a total time of 31 minutes. What is its average velocity from the starting position? Enter only the numerical part of your answer (in km/h) to two significant figures.tortoise crawls the entire 1000.0 meters at a speed of 0.20 m/s. The rabbit runs the first 200.0 meters at 2.0 m/s, stops to take a nap for 1.3 hours, and awakens to finish the last 800.0 meters with an average speed of 3.0 m/s. Who wins the race and by how much time? Get to destination at the same time. Rabbit wins by 47 s Tortoise wing by 47 s O rabbit wins by 2.02 hrs Tortoise wins by2.02 hoursA blue car travels down a straight road at a constant speed of 18.8 m/s. As they pass a red car, initially stopped on the side of the road, the red car speeds up at a rate of 1.77 m/s2. How much distance (in m) does the red car travel before it overtakes the blue car?