A car travels along a certain road at an average speed of 60mph and returns along the same road at an average speed of 20mph. Calculate the average speed for the round trip.

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.

A motorist drove from Bristol to Bath at an average speed of 40 mph and then from Bath to Chippenham at an average spped of 30 mph. What was her average speed for the whole journey? A. 35 mph B. 36 mph C. 70 mph D. need more information

A car is going 29.0 m/s when it begins to slow and comes to a stop in 100 meters. What was the acceleration of the car? a. -3.05 m/s² -4.21 m/s² O b. C. d. -5.01 m/s² *3.05 m/s² e. 4.21 m/s²

Hicham El Guerrouj of Morocco holds the world record in the 1500 m running race. He ran the final 400 m in a time of 51.9 s. What was his average speed in mph over the last 400 m?A. 14.2 mph                      B. 15.5 mphC. 17.2 mph                      D. 23.9 mph

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?

Young Hector launches a 200 gram block uphill on a frictionless ramp which is tilted at 30 degrees with the horizontal, as shown in the Figure. At the instant of its launch, the block is moving uphill at 4.00 m/s. Hector observes as the block travels a distance of 50.0 cm uphill on the ramp. In the following, consider the period of time during which the block moves uphill through the 50.0 cm distance shown in the Figure. For simplicity, assume that g = 9.80 m/2. d (50.0 cm) 4.00 m/s h 30°

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 street

If the fastest you can safely drive is 65 mi/h what is the longest time you can stop for dinner if you must travel 487 mi in 98h total? 2.5 h 2.3h O 1.8h O You can't stop at all.

One of the most difficult things to learn in physics is that our everyday language is not always precise enough. For instance, we might say a car is “slowing down”, but that only gives us information abouts velocity, not its acceleration. What can we say about the velocity of a car which has negative acceleration in the x-direction? a. It is slowing down. b. The x-component of its velocity is decreasing. c. The x-component of its velocity is negative. d. It is speeding up. e. The x-component of its velocity is positive. f. The x-component of its velocity is increasing.