Velocity - practice for 14 year olds
Number of problems found: 385
- Rotary motion
Find the orbital time, rotational frequency, and angular rate of the second and minute hands on the watch. - Wave parameters
Calculate the speed of a wave if the frequency is 336 Hz and the wavelength is 10 m. - Temperature 25901
Calculate the speed of sound in the air a) at a temperature of t = 20 °C b) at a temperature of t = 27 °C - Weighing 12481
A stone weighing 200g falls in a free fall for 3 s. Find its kinetic energy on impact. - Difference 82461
Determine the difference in angular velocities of the clock hands. [rad/s] ω of clock hands =? ω minute hands =? ω second hands =? - The temperature 28
The temperature rose 14°C in 3 1/2 hours. At what rate, in degrees per hour, did the temperature rise? - 3 pupils
Three pupils cleaned 10 meters of the stream in 1 hour. How many meters of the stream will clean 18 students in 4 hours? - Travel 27843
The car will travel 73 km in 1 hour. How long will it take to travel 94 km? - Kinetic energy
A 100 kg car has a velocity of 15 m/s. what is the car's kinetic energy? - Travels 41851
The car, with a weight of 20 kN, travels at a speed of 54 km/h. What is its kinetic energy? - Average speed
The car drove from city A to city B at 40 km/h and back to city A at a speed of 80 km/h. What was the average speed of the car? - Free fall
How long and at what speed does the body fall to the ground during a free fall from a height of 35 m? - The train
The train passed the observer in the 20s and passed through a 1500m tunnel in 2 minutes. Calculate the speed (km/h) and train length. - Roofers 20413
Three roofers put the roofing on the roof in 8 days. How long will it take to get two more after three days? - Bratislava 5046
A train will leave Bratislava for Trnava. Five minutes later, the train leaves Trnava for Bratislava at twice the speed. Which train will be closer to Trnava when they meet? - Train 2
The train slowed down from 90 km/h to 72 km/h in 5 seconds. How long does track travel? - Blueberries
Marie earns 3 liters of blueberries for 3.4 hours, and Peter 2.4 liters for 2.9 hours. How long do they pick one liter together? - Instantaneous 81036
Calculate the instantaneous free fall velocities at the end of the 1st, 3rd, 5th, and 7th seconds. Compile the results in a table. - Acceleration 58021
The runner reaches a speed of 30 km/h after 3 seconds from the start. Determine its acceleration. - Seconds 15853
The body landed on Earth in 9 seconds. Find from what height it fell and what its speed was on impact.
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