what must be your car's average speed in order to travel 235 km in 3.25 h?
What must be your average speed in order to travel 350 km in 5.15 h? A) 66.0 km/h B) 67.0 km/h C) 68.0 km/h D) 69.0 km/h An airplane increases its speed at the average rate of 15 m/s^2. How much time does it take to increase its speed from 100 m/s to 160 m/s? A) 17 s B) 0.058 s C)4.0s D) 0.25 s What is the mass of an object that experiences a gravitational force of 685 N...
What is the average speed, in km/h, for a car that travels 23 km in exactly 15 min?
On a road trip, a driver achieved an average speed of 68 km/h for the first 86.0 km and an average speed of 38 km/h for the remaining 54.0 km. What was her average speed (in km/h) for the entire trip? Round your final answer to three significant figures.
A hiker walks 3.25 km north and then 3.80 km west, all in one hour and twenty minutes. (A) calculate his average speed in km/h. (B) calculate the magnitude of his average velocity in km/h.
10p An airplane's airspeed (speed relative to still air) is 155 km/h. The wind speed relative to the ground is 28 km/h and is directed at phi 35 degrees as shown. "Determine (a) the 'heading', the angle theta the plane must be steered in order to travel in the direction of the runway. Also (b) determine the speed of the airplane relative to the runway in km/hr. airspd wind phi le 155 28 35 WIND
A police car is traveling at 144 km/h toward you. The police car's siren is sounding at a frequency of 550 Hz. What frequency of sound, in Hz, would you hear as you approach the police car at speed of 99 km/h?
9. A bicycle is to travel on a track with a length of 12 km. (a) The bicycle travels half of the total length at 10 km/h and the other half of the length at 30 km/h. (The transition fron one speed to the other is instantaneous (i.e., the velocity-versus-time graph is discontinuous at that transition point).) Determine the bicycle's average speed and its total travel time. (b) Instead, the bicycle travels this length at 10 km/h during half of...
A person takes a trip, driving with a constant speed of 97.5 km/h, except for a 24.0-min rest stop. The person's average speed is 74.2 km/h. (a) How much time is spent on the trip? h (b) How far does the person travel? km
The average speed of a Greyhound bus from Lansing to Detroit is 117.5 km/h. On the return trip from Detroit to Lansing the average speed is 53.2 km/h on the same road due to heavy traffic. What is the average speed of the bus for the round trip? What is the arithmetic mean of the two speeds above? What is the harmonic mean of the two speeds above?
1. A car moves along a straight street. The car's initial position at time t is given by a position vector T, The car's later position vector is , at time t2 Suppose T700 mi and T - 400 mi . a. If t2-t1 = 3,0 seconds, what is the car's average speed (assuming the car only moved in one direction)? b. What was the car's average velocity? 2. A runner jogs at a stendy pace of 15 km/hr. When...