2007-01-17 04:01:17 · 7 answers · asked by K A 1 in Science & Mathematics ➔ Physics
To change the speed of an object, the net force on it (the vector sum of all forces on it) must be nonzero. It doesn't matter what mix of what kinds of forces, they just need to sum to something that isn't zero. Then, you can use Newton's second law to calculate the acceleration (change in speed).
2007-01-17 07:04:59 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋
Forces cause masses to accelerate, or change velocity over time.
To calculate force, you'd have to know what kind of a velocity change you want, how long the force gets to act, and how massive the object is.
2007-01-17 04:04:39 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Any force. an object in motion tends to stay in motion, unless there is a force acting on it. (newton's first law of inertia). Put a force on it and it will change speed (or direction).
2007-01-17 04:12:27 · answer #3 · answered by suzie lou 2 · 0⤊ 0⤋
You vary the kinetic speed of course, kinetic is movement energy, so if you decrease the kinetic energy, you decrease the velocity (speed) and if you increase the kinetic energy, you increase the velocity (speed). I would say more...but that's the answer in a nut-shell.
Hope this helps! :D
2007-01-17 04:07:15 · answer #4 · answered by Chris K 2 · 0⤊ 1⤋
any force acting in the same or opposit direction to the direction of movement
2007-01-17 04:06:25 · answer #5 · answered by rykkers 3 · 0⤊ 1⤋
WHAT YOU HAVING, IM AT THE BAR NOW. YOU ARE IN NEED OF A STELLA I THINK.
2007-01-17 04:11:12 · answer #6 · answered by LOFTY 3 · 0⤊ 1⤋
hmm, resistance? or lack thereof?
2007-01-17 04:10:33 · answer #7 · answered by Anonymous · 0⤊ 1⤋