# Velocity - 8th grade (13y) - math problems

#### Number of problems found: 206

- Minute

Two boys started from one place. First went north at velocity 3 m/s and the second to the east with velocity 4 m/s. How far apart they are after minute? - Positional energy

What velocity in km/h must a body weighing 60 kg have for its kinetic energy to be the same as its positional energy at the height 50 m? - Pumps

Pump that draws water at velocity 3.5 liters per second water from a construction trench take 35 minutes. a) Find out how many minutes the water would run out of the trench pump that draws 7.4 liters of water per second. b) What is the pumping velocity wo - Rotary motion

Find the orbital time, rotational frequency, and angular rate of the second and minute hands on the watch. - Bob traveled

Bob traveled 20 meters to Dave's house. He arrived in 3 minutes. What was his average speed for the trip. - Wave parameters

Calculate the speed of a wave if the frequency is 336 Hz and the wavelength is 10 m. - RPM

An electric motor makes 3,000 revolutions per minutes. How many degrees does it rotate in one second? - Magnitude of angle

What magnitude has an obtuse angle enclosed by the hands of clocks at 12:20 hours? - Working together

One worker performs work in 3 days, the second in 5 days. How much do they work together? - Clock

How many times a day hands on a clock overlap? - Mail train

The speed of mail train is 1370 meter per minute. Express it in miles per hour correct to three significant figure . Given that 1 meter =39.37 inches. - Free fall

For how long and at what speed does the body fall to the ground during a free fall from a height of 35 m? - Gear wheels

Two gear wheels, which fit together, have the number of teeth z_{1}=58 and z_{2}=149. Calculate the speed of the first wheel, if the second wheel rotates 1232 revolutions per minute. - Free fall

Lloyd fall from height 7 m. Calculate the speed he hit the ground when falling with acceleration g = 9.81 m/s^{2} - Saw

Blade circular saw with a diameter 42 cm turns 825 times per minute. Expresses his cutting speed in meters per minute. - Book

Alena read a book at speed 15 pages per day. If she read twice as fast she should read a book four days earlier. How many pages have a book? - Cable car

The cable car will carry 1280 passengers in 40 minutes. How many people will be transported in 2.5 hours? - An airplane

An airplane flies 1440 km in 2 1/4 hours. What is its average speed in km per hour? - Clock Tower

What angle is betwenn hands on Clock Tower when show 17 hours and 35 minutes? - Two boats

The sightseeing boat sail at 25 km / h. The cruise take 6 hours. How long the another boat sails at 60 km/h?

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