165 Answered Questions for the topic Speed

Speed

03/10/18

Speed of 2 cars
car A and b start at same point. A travels north 10 mph faster then b. B travels west. After 1 hour they are 108 miles apart (straight line drawn between them) how fast is each car driving?  So I... more
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Speed

03/04/18

what was the speed of the car
 A 6755Kg demolition derby care traveled 52 meters in 1.5 seconds to avoid being hit by another car.   
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01/30/18

Find the speed
the sum of the speeds of two trains is 721.4 miles per hour. if the speed of the first train is 10.6 mph faster than the second train, find the speeds of each
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Speed

01/16/18

Arjay travelled at the speed of 70km/h and Tutor travelled at the speed of 80km/h. Tutor started 1/2 hour later than Arjay.
How long will it take for Tutor to overcome Arjay? If anyone is willing to help, please do so. This is my homework and I might need help. Thank You.
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01/15/18

What is the acceleration of the satellite? Direction of the acceleration? What is the name of the force providing the acceleration? Speed of satellite?
a 1000kg satellite orbits the Earth at a radius of 50,000 km.  What is the acceleration of the satellite? The direction of the acceleration? What is the name of the force providing the... more
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01/15/18

What is the radius of the circle?
A car is turning on a circular path with a constant speed of 7 m/s. If the car mass is 1200 kg and the coefficient of static friction is between the cars tires and the road .68 what is the radius... more
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01/12/18

What speed will the child reach the bottom of the slide
A 42 kg child slides from the top of a 3 m high playground slide. With what speed will the child reach the bottom of the slide assuming: (a)There is no friction? (b) 23 J of energy is dissipated... more
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12/08/17

Speed of a current
Suppose you paddle a row boat at a steady speed of 4 miles per hour. You go 6 miles downstream and then 6 miles upstream to get to where you started. The trip takes 4 hours. What is the speed of... more
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Speed

12/05/17

Finding the speed of a plane
Flying with the wind a plane went 183km/h. Flying into the same wind the plane only went 141km/h. Find the speed of the plane still in still air and the speed of the wind.
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12/04/17

What is the speed of the wind? Solve algebraically
An airplane makes a 1200km flight with a tailwind, and returns flying into the same wind. The total flying time is 4 hours 50 minutes, and the airplane's speed in still air is 500km/h. What is the... more
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11/27/17

Angular speed
A winch is 30cm in diameter. The cable wrapped around it is pulled at 8 ft/s. Find the angular speed of the drum in revs per minute 
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Speed

11/18/17

Plane has cruising speed of 300 mph with no wind. At this speed it flew 600 miles with wind in same time to fly 400 against wind. Find speed of wind
Find speed of wind
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11/12/17

A rock thrown horizontally at a large bell 30.0m away is heard to hit the bell after 2.50 seconds. If the speed is 300.0m/s, what is the speed of the rock?
Please show me how to solve using vav=d/t.
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11/12/17

A car travelling at 90.0km/h is 100.0m behind a truck travelling at 50.0km/h. How many seconds will it take the car to reach the truck?
Please show me how to solve using vav = d/t.
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Speed Time Gravity

10/25/17

A man stands before a train. We noticed that after 2seconds the first wagon has passed. How many seconds are needed for the 16th wagon to pass?
A man stands before a train. We noticed that after 2 seconds the first wagon has passed. How many seconds are needed for the 16th wagon to pass? The speed is constant
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Speed

09/27/17

Word problem on speed and current
Phillip left his campsite to a fishing spot 1.8 km downstream. He timed his trip and found that it took 9 minutes. His return trip up stream took 22.5 minutes. Determine the speed of which he... more
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Speed

09/12/17

The speed of the boat still in water
the speed of a stream is 3 mph. a boat travels 4 miles upstream in the same time it takes to travel 10 miles downstream. what is the speed of the boat in still water
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Speed

09/11/17

Find the speed of the train
the speed of train A is 18 mph slower than the speed of train B. Train A travels 190 miles in the same time it takes train B to travel 280 miles
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08/28/17

Derive expression for speed
Derive a symbolic expression for the speed v at which a particle of charge -Q and mass m must move to hold itself in a circular orbit of radius r centered on a massless particle of charge 4Q that... more
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08/21/17

Energy in Simple Harmonic Motion help?
A .500 kg mass is oscillating on a spring with k= 330 N/m. The total energy of it's oscillation is 3.24 J. What is the speed of the mass when it is .100 m from the EP?
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Speed Rpm

08/02/17

If the diameter of my wheel is 2.323 inches and I'm traveling at 39 kmph what is the revolutions a minute? Please give me the answer and explain Thanks
I need to find out the rotations a minute 
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08/01/17

How rpm is my penny board wheel going? The circumfrance of my wheel is 2.323 inches and I'm going 36km/h how many times is my wheel rotating a second
How many rpm is my skateboard wheels going??
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Speed Word Problem

05/19/17

What was James's rowing speed in still water?
James could row at 3 times the speed of the water in the river. He could row 16 miles downstream in 2 hours less than it took him to row 14 miles upstream.
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Speed

05/16/17

Priya drove a total of 426.65 kilometers to see her grandmother. The trip took 5.3 hours. What was priya's average rate of speed for the trip?
Trying to find the rate of speed for the trip  
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05/08/17

Distance, Time, and Speed problem
John traveled from Town A to Town B at a rate of 55 mph. Traffic was bad on his return trip home, and he traveled at a rate of 45 mph, so it took him an hour longer. How long did it take him to... more
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