Acceleration - practice problems
Number of problems found: 131
- Eighty 2
Eighty children went on a field trip. If three-fifths of them were boys, how many are girls?
There are 500 students in a school. 60% of them are boys and the rest are girls. What is the percentage of girls? Also find the total number of boys and girl in the school.
- 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.
- Quartile statistics
Use the following data which was obtained from a study of weights of adult men to answer problems: Mean ; 192 lb ; First quartile ; 178lb Median; 185lb ; Third quartile ; 232 lb Mode ; 180 lb ; 86th percentile ; 239 lb Standard Deviation ; 23lb; ; a) What
- 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.
- 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
- Busi has
Busi has a bag containing twenty balls. There are twice as many yellow balls than blue balls, but the yellow balls are only a third of the red balls. The green balls are the same number as the blue balls. How many are each of the colour ball?
- The MRT train
The MRT running from Taft to North Avenue has a starting velocity of 60km/hr. After a malfunction, the brakes failed, making the train run with a velocity of 80km/hr. What is the acceleration rate if the time for velocity change is 5 seconds?
- Increases 69454
The car weighs 1850 kg and increases its speed from 27 to 81 km / h. How much has its kinetic energy increased?
- Power during takeoff
The aircraft weighing 3.5 tons will disembark 1 km in 1 minute after takeoff and reach a speed of 290 km/h. Find the average power of its engines during this time.
- Determine 69154
Determine the pump power if: I pour 3 m³ of water from the tank in 120 seconds with a hose. The height of the hose mouth above the tank is 1.5 m. The speed of the water from the mouth of the hose is 20 m / s.
- Increasing 69094
The aircraft weighing 61 t climbed from a height of 1000 m to a height of 3000 m while increasing the speed from 170 m / s to 210 m / s. What work did the aircraft engines do?
Renting video games from Store S costs $2.50 per game plus a monthly fee of $5.00. Renting a video games from Store T costs $5.00 per game with no monthly fee. The monthly cost to rent video games depends on the number of video games, v, rented. Which
- Transfers 67414
At the height of 80 cm above the road, a person transfers a stone weighing 2 kg parallel to it in a uniform motion along a path of 6 m in 10 s. With what power does it work?
- Vertically 65984
We threw the stone vertically upwards at a speed of v = 15m. s-1. How long will it be at a) 10 m, b) 12 m?
- Gravitational 63504
Due to the force of gravity, a freely released body falls towards the Earth. The reaction to the gravitational force is of equal magnitude and acts on the Earth at its center. Explain why we do not observe the motion of the Earth towards the body.
- Acceleration 61824
On a sphere weighing 100 g, which lies on a horizontal plate, a force acts in the horizontal direction, which gives it an acceleration of 20 cm. s ^ -2. Find the magnitude of the force.
- Newton law
At what acceleration moves a train with a weight of 800 t start if the traction force of the locomotive is 2 * 105 N?
- Linear temp change
The temperature in Inuvik, Northwest Territories, increased at the same rate from -22°C at 9:00 AM to -8°C at 4:00 PM one day. What was the temperature at 2:00 PM?
- Acceleration 58021
The runner reaches a speed of 30 km / h after 3 seconds from the start. Determine its acceleration.