I'm not really understand this sentence from question, "Its fuel lasts for 10 sec" does it mean the time from the rocket start flying to hitting the ground. Or, other meanings...mfb said:Those formulas are all you need. Split the motion into two parts - the time where the fuel is burning and the free fall afterwards.
What are velocity and displacement after 10 seconds? What happens afterwards?
You can assume that the rocket starts on the ground, at rest, and accelerates perfectly vertical. A good problem statement would have made this clear, but whatever.
HTT said:I'm not really understand this sentence from question, "Its fuel lasts for 10 sec" does it mean the time from the rocket start flying to hitting the ground. Or, other meanings...
Thank you so much, I think I got it~.SteamKing said:Assume at t = 0, the rocket is on the ground, and the fuel is ignited. The rocket takes off and flies straight up. At t = 10 s, the fuel is exhausted and the rocket is no longer accelerating due to the burning of the fuel. What happens next?
Projectile motion is the motion of an object through the air, under the influence of gravity, after being launched or thrown at an angle.
To calculate the maximum height of a projectile, you can use the formula h = (v02sin2θ)/(2g), where h is the maximum height, v0 is the initial velocity, θ is the launch angle, and g is the acceleration due to gravity (9.8 m/s2).
The time in air of a projectile is affected by the initial velocity, launch angle, and the acceleration due to gravity. The air resistance and height of launch also play a role in the time in air of a projectile.
To find the time in air of a projectile, you can use the formula t = 2v0sinθ/g, where t is the time in air, v0 is the initial velocity, θ is the launch angle, and g is the acceleration due to gravity (9.8 m/s2).
Yes, projectile motion equations can be used to calculate the trajectory of a ball thrown at an angle. By using the equations for displacement, velocity, and acceleration, the trajectory of a ball can be determined. However, this assumes that there is no air resistance and the ball is not affected by external forces such as wind.