165 Answered Questions for the topic Speed

09/10/15

Driving at 75m/s, you hit the brakes on your new car, accelerating at a rate of -20m/s. How long will it take the car to come to rest?
Driving at 75m/s, you hit the brakes on your new car, accelerating at a rate of -20m/s. How long will it take the car to come to rest?   Show work (Acceleration or Average Speed)
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09/10/15

Riding your bike, you can accelerate at a rate of 1.5m/s^2. If you accelerate for 17 seconds, how much speed will you gain?
Riding your bike, you can accelerate at a rate of 1.5m/s^2. If you accelerate for 17 seconds, how much speed will you gain?   (s) = seconds   SHOW WORK (Average Speed or Acceleration)
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09/10/15

Riding your bike, you can accelerate at a rate of 2m/s^2. If you start from rest, how long will it take to reach a speed of 20m/s?
Riding your bike, you can accelerate at a rate of 2m/s^2. If you start from rest, how long will it take to reach a speed of 20m/s?   Show work (Average Speed or Acceleration)
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Speed

08/24/15

Simple Speed Comparison Problem
Dale starts walking to school at a constant speed. Five minutes after he leaves, Dale's sister Ruby realizes that Dale forgot his lunch. Ruby knows that she can run two times the speed that Dale is... more
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08/19/15

which describes motion in which the person or object is accelerating?
a. a bird flies straight from a tree to the ground without changing speeds b. a dog walks at a constant speed along a straight sidewalk c. a girl runs along a straight path the same distance each... more
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07/18/15

Physics: Multiple Choice: what happens to the wavelengths of the siren as measured by the observer while the police car approaches to when he goes away?
A police car is driving past an observer sitting by the side of the road, what happens to the wavelengths of the siren as measured by the observer while the police car approaches to when he goes... more
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07/15/15

Physics: Frequency
At very fast car races the sound of the engine as a car approaches is much different than when it passes you.   How fast would the car need to be going to have the change in frequency be one... more
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07/08/15

Physics: Kinetic Theory
Kinetic theorya. What is the average kinetic energy of a monatomic gas at a temperature of 354 K?b. If this is Ne gas (neon has 20 nucleons) what is the root-mean-squared speed?c. What temperature... more
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07/07/15

Math/Physics
A commuter train travels from Baltimore to Washington DC and back in 1 hour and 45 minutes. The distance between these two stations is about 40 miles.  a.) What is the average velocity of the... more
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07/05/15

Physics: Kinetic Theory
Kinetic theory a. What is the average kinetic energy of a monatomic gas at a temperature of 354 K? b. If this is Ne gas (neon has 20 nucleons) what is the root-mean-squared speed? c. What... more
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Speed

06/24/15

Against the wind a commercial airline in South America flew 1,008 miles in 4.5 hours.
Against the wind a commercial airline in South America flew 1,008 miles in 4.5 hours. With a tailwind the return trip took 4 hours. What was the speed of the plane in still air? What was the speed... more
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06/18/15

Physics: What is the tangential velocity, and how many revolutions?
The new blade on my table saw has a radius of 15.0 cm. My table saw has a maximum speed of 3750 rpm. If it takes 2.50 seconds to get up to this final speed, what is the tangential velocity of the... more
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06/18/15

Physics: What is her momentum of Inertia?
A figure skater can increase her angular velocity from a speed of 2.00 revolutions in 3.00 seconds to 5.00 revolutions in 2.00 seconds by bringing her arms in. If her moment of inertia was 4.60 kg... more
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Speed

06/13/15

wind speed
an airplane can fly 1216 miles from city A to city B in 4 hours with the wind. The same airplane take 8 hours against the wind for the return trip. What is the speed of the wind?
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Speed Physics Energy

06/11/15

a spring of force constant 200N/m is compressed through a distance of 0.05m calculate the energy stored in the string
 I.calculate the energy stored in the string II.if the energy in (I.) above is imparted to a body of mass 0.5kg to set it in motion calculate the speed acquired by the body
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06/03/15

Traveling at a speed of 60-70 per hour, about how long would it take to travel a distance of 1500 miles?
Traveling at a speed of 60-70 per hour,  about how long would it take to travel a distance of 1500 miles? 
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Speed

03/20/15

help me find the speed of this questions
When Eugene rows his gondola in still water he travels at 3 mph. When Eugene rows his gondola in the Grand Canal, he can travel 2.8 miles when rowing with the current in the same amount of time as... more
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Speed Math Science Time

03/01/15

If Justin races his Checy S-10 down Highway 4 for 2,560 meters in 60 seconds, what is his average speed(velocity)?
If Justin races his Checy S-10 down Highway 4 for 2,560 meters in 60 seconds, what is his average speed(velocity)?
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Speed

02/25/15

It is 4,140 miles from New York to London and it takes 7.5 hours to fly what is the speed of the jet?
It is 4,140 miles from New York to London and it takes 7.5 hours to fly what is the speed of the jet?  
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Speed Time

02/18/15

speed and time word problem
A truck begins a trip at noon. From noon until 345pm the truck travels with a speed of 45 miles per hour. From 345pm until the truck ends it's trip the truck travels with a speed of 55 mph. At what... more
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02/08/15

Find the speed of light in glass, the angle of refraction in glass and the critical angle
The index of refraction of glass is 1.5. Find the speed of light in glass, the angle of refraction in glass, if the light is incident from water at an angle of 40°, the critical angle of incidence... more
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Speed

01/22/15

calculate the speed
calculate the speed of the race car 8km/hr and the time of .03 hrs
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Speed

01/22/15

Find the speed
A race car travels 11km in .83 hrs. Find the speed in kilometers per hour
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Speed Physics Sound

01/15/15

what is the angle of refraction in air?
The speed of sound in water is 1500 m/s. A sound wave from an underwater explosion approaches the surface at an angle of incidence of 60°. What is the angle of refraction in air? (speed of sound in... more
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Speed

12/17/14

Average Speed
I was in Los Angeles, Ca and I went to Topeka, KS. It took me 23 hours of driving and 1,557 miles to get there. Can you help me figure out what my average speed was ?                              ... more
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