# Physics

if the unit of power is the watt (W), and P = Fd/t, show using the result of question (2) and the fact that distance (d) uses units of meters and time has units of seconds.

*** question 2. If m represents mass in kg, v represents speed in m/s, and r represents radius in m, show that the force F in the question F = mv^2/r can be expressed in the unit kgm/s^2.

F=mv^2/r -----> kg(m/s)^2/m ---> kgm^2s^2/m = kgms^2

1. 👍 0
2. 👎 0
3. 👁 173

## Similar Questions

1. ### chemistry

A 100-watt light bulb radiates energy at a rate of 100 J/s. (The watt, a unit of power or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

asked by anon yo on October 6, 2016
2. ### Algebra

An amplifier has a 50 watt output and a 5 watt input. What is the gain in decibels for this amplifier, rounded to the nearest decibel?

asked by Anonymous on March 28, 2017
3. ### CVP Analysis - Business Math

Engineering estimates show that the variable cost of manufacturing a new product will be \$35 per unit. Based on market research, the selling price of the product is to be \$120 per unit and variable selling expense is expected to

asked by Steph on October 16, 2012
4. ### Physics

100 sec is it correct? Assume that it takes 10,000 Joules of energy to raise 100 grams of cake batter from room temperature (23 ∘ C) to 90 ∘ C (fully cooked). How many seconds would it take for a 100-Watt light bulb to output

asked by Anonymous on May 12, 2020
5. ### algebra

If an electronic circuit experiences a loss of 3 decibels with an input power of 6 watts, what would its output power be, to the nearest watt?

asked by Jay on July 1, 2012
1. ### Electrotechnics N4

A circuit,consisting of 3 resistances 12,18 & 36 ohms respectively joined in parallel is connected in series with fourth resistance.the whole is supplied at 60 volt & it is found that the power dissipated in the 12Ohm resistance

asked by Siboniso on June 30, 2011
2. ### HVAC

two HVAC technician are discussing units of energy.Technician A says that a BTU is defined as the work performed by a force of 1 neton[N] moving and object over a distance of 1 meter[M].Technician B says that that if you have a 60

asked by simon on December 13, 2017
3. ### Physics

Which of the following is not a unit of power? a)hp b)J c)W d)J/s I answered d. J/s because its measuring speed and not power. I don't know if its correct or not.

asked by Aisumi on October 29, 2010
4. ### Math Check

1. Select the word that correctly completes the sentence below To convert from a smaller unit to a larger unit, you ____ by a power of ten. A) Add B) Subtract C) Multiply **** D) Divide