Fundamentals of Physics - math problems
Number of problems found: 248
- Motor physics
Car traveling at 130 km/h on the highway. Pulling power of the motor is 8 kN. Determine engine power in kW.
- Rocket start
The body launched vertically up returns to the start site in 6 seconds. What height did it have?
- Midnight 2
It was 8 degrees at nightfall. The temperature dropped 10 by midnight. What was the temperature at midnight?
- Free fall
How long does the stone fall freely into a depth of 80m? What speed will it hit the bottom of the abyss?
- Rotary motion
Find the orbital time, rotational frequency, and angular rate of the second and minute hands on the watch.
- Free fall
The free fall body has gone 10m in the last 0.5s. Find the body speed at the moment of impact.
- Gold horseshoe
Calculate the volume of a gold horseshoe that weighs 750g.
A 60 W bulb consumes 0.12 kWh of electricity. How long did she stand light without a break?
- Earth rotation
How fast is the place on the Earth's equator moving if the Earth's radius is 6378 km?
- Wave parameters
Calculate the speed of a wave if the frequency is 336 Hz and the wavelength is 10 m.
An electric motor makes 3,000 revolutions per minutes. How many degrees does it rotate in one second?
A circuit has an input power of 58 mW. Its output power is 6 mW. What is the loss in decibels?
The boy pushes the wheelchair with a force of F1 = 20N. The wheelchair exerts a force of F2 on the boy. How large is this force?
By what percentage does the sound intensity increase if the sound intensity level increases by 1 dB?
What is the power output of kettle 2 kW with efficiency 90%?
What is the area of crosssection of the piston, if the force of 300 kN produces a pressure of 5 MPa?
Locomotive pulled a train permanent load of 200 kN horizontally along the track of 5km. What work it done?
- The bulb
Calculate what voltage is at the terminals of the bulb, if the work is done 18 J to transfer particles with an electric charge of 6 C.
- Resistance of the resistor
The resistor terminals have a voltage of 20 V and a current of 5 mA is passed through. What is the resistance of the resistor?
- Time clock
What is the angle of the hour hand and the minute hand, if it is 0:40?