# Velocity - practice problems

The velocity of an object is the time rate of change of its position. Velocity is a specification of an object's speed and direction of motion (e.g. 20 m/s to the south).In everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position) - scalar.

#### Number of problems found: 690

- A sand

A sand timer has 5 5/16 ounces of sand. If the sand falls at a rate of 2.5 ounces per minute, how many minutes will the timer last? Write your answer as a fraction. - Water level 7

Between 9 P.M. and 6:45 A.M., the water level in a swimming pool decreased by 4/9 inch. Assuming that the water level decreased at a constant rate, how much did the water level drop each hour? - A particle 2

If the motion of a particle is described by the relation a(t) = 7t³ + 2 m/s², and the initial velocity of the motion is zero when t = 0 and the distance is 2m, t = 0.5s. Determine the velocity and displacement when t = 10s. - Electric charge

The electric current in a microprocessor circuit is 0.230 μA. How many coulombs pass a given point in the circuit in 1.50 ms? - A speedboat

A speedboat goes 900 km against a current of 25 km/hr. It took 10 minutes longer for his trip than it would have taken it to travel with the current. What is the speedboat’s speed in still water? - The speed 2

The speed of an electric locomotive is 90/h. express this speed in m/s. - Water 63

Water was heated at the rate of 6°c per minute for 14 minutes. It then cooled at the rate of 8°c per minute. What will be its temperature after 24 minutes if its original temperature was 40°c? - Measured 74724

How long would a tourist walk the route if he measured 24.9 cm on a map with a scale of 1:25000? The marching speed is 4 km/h. - A boy 2

A boy dropped a coin from top of the dry well and a sound was heard by him 6 seconds later. Considering this as a free-fall object, how deep is the well? The speed of sound in air is approximately 343 m/s. - North + west

Find the magnitude of the resultant of the given vectors: vector 1: 2 m/s, north vector 2: 7 m/s, west - The distance 2

The distance between two ports M and N is 2100km. If two ships travel towards each other with one ship leaving port M at 20km/h and at the same time another ship from port N travel 15km/h. (I) How long will it take the two ships to meet. (ii) how far will - What power 2

What power has a pump output to move 4853 hl of water to a height of 31 m for 8 hours? Comparing the power generated by the pump vs. the power generated by the motor, which is more efficient? Which, the pump or the motor generates the more pollution if fo - Impulse, force and momentum

A 50 kg mass is sitting on a frictionless surface. An unknown constant force pushes the mass for 2 seconds until the mass reaches a velocity of 3 m/s. What is the value of the unknown force? b) through your solutions prove that Impulse and momentum will h - The change

The change in momentum of an unknown object was 56N.s. What was the force applied when it moved a distance of 2m in 10 seconds? - Three trucks

There are places A and Y, three trucks, B, C, and D, respectively. Truck B is 60 km/h, C is 40 km/h and D is 80 km/h. Trucks B and C start at place A while D starts at Y. After D and B meet, two hours later, will D meet C. What is the distance between pla - A bus 2

A bus travelled from Town A to Town B. The whole journey, a 240 km ride, started at 1:00 p.m. and ended at 5:00 p.m. Find the average speed of the bus. - Buses A and B

Bus A leaves Worcester at 08:00 and travels north along the N1 at 50 km/h. Bus B leaves Worcester at 10:00 along the same route at 70 km/h. At what time will bus B pass bus A? - The truck

What is the mass of a 10 wheeler truck if it has reached a momentum of 567kg.m/s while it moves at 40m/s - Which 10

Which will have greater momentum between a 10 wheeler truck weighing 7,000 kg and a bus that weighs 5,000kg if the bus is moving at 15 m/s while the truck is moving at 10 m/s? - An airplane 2

An airplane left Changi International Airport at 9 p.m. and fly 5841 km to Dubai International Airport. If the airplane flies at an average speed of 649 km/h, what is the arrival time of the plane? A) 6 a.m. the same day B) 8 a.m. the same day C) 6 a.m. t

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