Physics Homework: Car & Rocket Motion Analysis

AI Thread Summary
A car rolls down a 21-degree incline with a constant acceleration of 3.37 m/s² for 70.0 m before falling 40.0 m into the ocean, prompting calculations for its position upon landing and time in the air. The rocket launches at a 58-degree angle with an initial speed of 96 m/s, accelerates for 3.00 seconds at 28.0 m/s², and then becomes a projectile, requiring calculations for maximum altitude, total flight time, and horizontal range. Participants in the discussion are encouraged to show their work for assistance, and there is a mention of using kinematic equations to solve the problems. The focus remains on applying physics principles to analyze motion in both scenarios. Understanding the kinematic equations is essential for solving these problems effectively.
kbbate9850
Messages
1
Reaction score
0
1. A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 21 degrees below the horizontal. The driver leaves the car in neutral and it rolls from rest down the incline with a constant acceleration of 3.37 m/sE2 for a distance of 70.0 m to the edge of the cliff, which is 40.0 m above the ocean. Find the car's position relative to the base of the cliff when the car lands in the ocean in meters. Find the length of time the car is in the air in seconds.

2. A rocket is launched at an angle of 58.0 degrees above the horizontal with an initial speed of 96 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 28.0 m/sE2. At this time, its engines fail and the rocket proceeds to move as a projectile. Find the maximum altitude reached by the rocket in meters. Find its total time of flight in seconds. Find its horizontal range in meters.

I figured out the x and y components in the first one but i don't know where to go from there. The situation is about the same for the next one.
 
Last edited:
Physics news on Phys.org
Show your work and you'll get plenty of help.
 
kbbate9850 are you familiar with the Kinematic equations?
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'Collision of a bullet on a rod-string system: query'
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top