What is the net force needed to accelerate a rocket sled to 1600 km/hr in 1.8 s?

  • Thread starter Thread starter raincheck
  • Start date Start date
  • Tags Tags
    Kinematics
AI Thread Summary
To determine the net force required to accelerate a rocket sled to 1600 km/hr in 1.8 seconds, the correct approach involves first calculating the acceleration. The sled's mass is 500 kg, and the velocity must be converted from km/hr to m/s for accurate calculations. The formula F = ma applies, where 'a' is derived from the change in velocity over time. After finding the acceleration, the net force can be calculated using the mass of the sled. Proper unit conversion and understanding of acceleration are crucial for obtaining the correct answer.
raincheck
Messages
38
Reaction score
0
"An experimental rocket sled can be accelerated at a constant rate from rest to 1600 km/hr in 1.8 s. What is the magnitude of the required net force if the sled has a mass of 500 kg?"

I know I have to use
[sum of the] F = ma

and i was trying
= 500 x 1600,
but I'm sure there's something else I have to do to get the right answer, since this isn't working..
 
Physics news on Phys.org
Look again at the definition of acceleration. You have used velocity in place of acceleration. Be careful with your units. km/hr is not m/s.
 
If you are having trouble, try solving it in terms of kinematics first. After you find the acceleration, then you can do what you did.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »

Similar threads

How Much Force to Accelerate a Rocket Sled to 1000 km/h in 1.8 Seconds?
Replies
2
Views
2K
What is the magnitude of the average force?
Replies
2
Views
2K
Acceleration = (Force of boy on sled - Force of friction)/Mass of sled
Replies
3
Views
2K
Calculating force needed to push sled down incline
Replies
4
Views
3K
What is the Tension and Acceleration in Newton's Law of a Sled Problem?
Replies
3
Views
2K
How Long Does It Take a Sled to Reach 24 m/s on an Incline?
Replies
6
Views
1K
Physics 161 Forces Homework: Calc Net Force of 340 kg Rocket Sled
Replies
5
Views
2K
Find the magnitudes of all of the forces acting on the sled
Replies
5
Views
2K
Rocket acceleration problem: confused about Newton's 2nd Law
Replies
42
Views
5K
How Much Force Did the Rocket Exert on the Sled?
Replies
6
Views
2K

Hot Threads

Recent Insights

Back
Top