Fundamentals of Physics - math problems

Number of problems found: 248

  • Motor physics
    car_motor Car traveling at 130 km/h on the highway. Pulling power of the motor is 8 kN. Determine engine power in kW.
  • Rocket start
    freefall1 The body launched vertically up returns to the start site in 6 seconds. What height did it have?
  • Midnight 2
    midnight It was 8 degrees at nightfall. The temperature dropped 10 by midnight. What was the temperature at midnight?
  • Free fall
    volny pad How long does the stone fall freely into a depth of 80m? What speed will it hit the bottom of the abyss?
  • Rotary motion
    clocks2_1 Find the orbital time, rotational frequency, and angular rate of the second and minute hands on the watch.
  • Free fall
    volny_pad_2_ap The free fall body has gone 10m in the last 0.5s. Find the body speed at the moment of impact.
  • Gold horseshoe
    podkova Calculate the volume of a gold horseshoe that weighs 750g.
  • Bulb
    bulb _2 A 60 W bulb consumes 0.12 kWh of electricity. How long did she stand light without a break?
  • Earth rotation
    earth_1 How fast is the place on the Earth's equator moving if the Earth's radius is 6378 km?
  • Wave parameters
    frequency-and-wavelength Calculate the speed of a wave if the frequency is 336 Hz and the wavelength is 10 m.
  • RPM
    motor_rpm An electric motor makes 3,000 revolutions per minutes. How many degrees does it rotate in one second?
  • Decibel
    db A circuit has an input power of 58 mW. Its output power is 6 mW. What is the loss in decibels?
  • Wheelchair
    vozik 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?
  • Decibel
    tv_1 By what percentage does the sound intensity increase if the sound intensity level increases by 1 dB?
  • Efficiency
    rychlovarna-kanvica What is the power output of kettle 2 kW with efficiency 90%?
  • Megapascals
    engine What is the area of crosssection of the piston, if the force of 300 kN produces a pressure of 5 MPa?
  • Locomotive
    locomotive_1 Locomotive pulled a train permanent load of 200 kN horizontally along the track of 5km. What work it done?
  • The bulb
    bulb _5 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
    Elektrárna_1 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
    clocks2_4 What is the angle of the hour hand and the minute hand, if it is 0:40?

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