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Does acceleration constantly add speed?
I'm trying to teach myself physics and I'm having a tough time with acceleration.
If I take the velocity of an object falling (say, one second, two seconds and three seconds) would the three velocities be different? Also, what if I throw a ball upwards? Would ball decelerate on the way up and accelerate on the way down because of gravity?
What if I wanted to draw a free-body diagram of a ball thrown upwards at an angle? I know there is a velocity applied once I throw the ball, would that velocity stay the same while the ball is being thrown? That is, if I throw the ball at 30º at 5m/s, would the ball always have a velocity of 5m/s at 30º which would then be added with the force of gravity?
Thank you for your help.
2 Answers
- don_sv_azLv 79 years agoFavorite Answer
3 velocities different. Yes
Upwards. same thing except the velocity will go down to zero and then accelerate toward the ground.
Thrown at an angle you have to calculate the two vectors. It will have a starting velocity measured vertically which will be affected by gravity, it will also have a horizontal velocity that will remain the same (except for wind resistance which for physics and math problems is usually ignored) and not be affected by gravity.
For example your ball thrown at an angle might have 2.5 m/s vertical sped and 4 m/s forward speed at the beginning. The forward speed would remain 4 m/s the vertical speed would change over time.
- ?Lv 45 years ago
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