How fast was your nephew moving

Reference no: EM13689940

Solve the given problem:

Problem: You have built a homemade skate board for your nephew out of a plank and a set of wheels. Your nephew speeds up to a final speed of 5 m/s on level ground. Your nephew throws himself backward off the skateboard, kicking the rickety skateboard forward at 7 m/s. Your nephew has a mass of 70kg and the skateboard's mass is 10kg.

A- How fast was your nephew moving when his feet left the skateboard?

Please use great detail in explaining the solution. Thank you.

Reference no: EM13689940

Questions Cloud

Explain what is the molecular weight of the unknown gas : Problem- Methane gas ch4 diffuses 2.3 times faster than an unknown gas at the same temperature and pressure. What is the molecular weight of the unknown gas

Explain what is [ha] at equilibrium : Problem- If 79.0 mL of 0.127 mol/L NaOH(aq) and 50.0 mL of 0.189 mol/L HA(aq) are mixed, then what is [HA] at equilibrium. Assume that HA is a weak monoprotic acid with pKa=5.55 at 25oC.

Calculate the [fescn]eq : Problem- If the [FeSCN]std is 3.50x10^-4 M and the absorbance at equilibrium is 0.162 and the absorbance of the standard is 0.299, calculate the [FeSCN]eq.

What temperature is the reduction of tungsten oxide : Problem- At what temperature is the reduction of tungsten oxide by hydrogen to give metallic tungsten and steam spontaneous. The standard heat of formation of WO3(s) is -843kJ/mol and its standard molar entropy is 76 J/ (K*mol).

How fast was your nephew moving : You have built a homemade skate board for your nephew out of a plank and a set of wheels. How fast was your nephew moving when his feet left the skateboard

Calculate the terminal velocity of the particle : A spherical particle is released 15 ft below water level. The specific gravity of the particle is 0.95 and its diameter is 0.1 in. Assuming steady state: Calculate the terminal velocity of the particle

Explain physically how this happens : When an electromagnetic wave is reflected from a moving reflector, the frequency of the reflected wave is different from that of the initial wave. Explain physically how this happens

How many wavelengths are on string at any instant of time : A 1.70-m string of weight 1.40 N is tied to the ceiling at its upper end, and the lower end supports a weight W. How many wavelengths are on the string at any instant of time

Compute what is the change in the primary current : During a 75-ms interval, a change in the current in a primary coil occurs. This change leads to the appearance of a 5.7-mA current in a nearby secondary coil. What is the change in the primary current

User Account

All Pages