The problem involves calculating the net force required to accelerate a 340 kg rocket sled from rest to 1900 km/h in 2.6 seconds. The context is rooted in dynamics and force calculations.
The discussion includes attempts to clarify the calculations and assumptions made regarding unit conversions. Some participants are verifying the accuracy of their calculations and questioning the interpretation of squared units in the context of acceleration.
There is a focus on ensuring correct unit conversions and understanding the implications of acceleration in the calculations. Participants are navigating through potential misunderstandings related to the problem setup.
Kawasaki268F said:Homework Statement
1. A 340 kg rocket sled can be accelerated at a constant rate from rest to 1900 km/h in 2.6 s. What is the magnitude of the required net force?
Homework Equations
The Attempt at a Solution
1. So I tried calculating the acceleration and multiplying it by the mass. For the acceleration I tried dividing 1900km/h by 2.6s and multiplying it by the mass however that did not work.
C268 said:Yes sorry I did do that, forgot to mention that above
PeterO said:Ok approximating
1900km/h is a little over 500 m/s
A little over 500 in 2.6 must be about 500 in 2.5 seconds so acceleration is around 200 ms-2
F = ma says 200 * 340 so approx 68 000 N
What answer did you get?
Kawasaki268F said:Sweet thanks! I just forgot about the squared part on 200m/s