initial speed Definition and 135 Threads

1. Determining the relationship between initial speed of a cart (with magnets, aligned with and moving towards magnets on a wall) and the stopping distance from the wall) 2. Kinetic energy(Ke)=Magnetic potential energy(Mpe) Ke=mv^2/2 Mpe=km1m2/r mv^2/2=km1m2/r...

Homework Statement A) The ball's PE is a constant. B) The velocity vector and the acceleration vector are in the same direction after t= 7.3s. C) The acceleration is constant. D) The acceleration is 0 near t= 7.3s. E) Maximum height is reached at about t=7.3s. F) The ball's KE increases...

Homework Statement A ball thrown straight upward returns to its original level in 3.00 s. A second ball is thrown at an angle of 36.0° above the horizontal. What is the initial speed of the second ball if it also returns to its original level in 3.00 s? anwer : ___ m/s Homework...

Help finding the initial speed please ! Homework Statement An archer shoots an arrow horizontally at a target 12 m away. The arrow is aimed directly at the center of the target, but it hits 52 cm lower. What was the initial speed of the arrow? (Neglect air resistance.) Homework...

A ball is projected horizontally from the edge of a table that is 0.823 m high, and it strikes the floor at a point 1.44 m from the base of the table. The acceleration of gravity is 9.8 m/s2 . What is the initial speed of the ball? An- swer in units of m/s. the table is .823 m high...

[SOLVED] Basic Initial Speed Problem Hello, I've just picked up physics in year 10 and I'm keen to get started. So far I've been fine; I've been taught how to find velocity and acceleration of certain objects, but I'm unsure how to re-arrange the equations I've learned to solve other problems...

bullet and pendulum bob...initial speed...help! momentum. Homework Statement An 7.0 g bullet is fired into a 3.5 kg pendulum bob initially at rest and becomes embedded in it. If the pendulum rises a vertical distance of 8.0 cm, calculate the initial speed of the bullet. ________m/s...

If a space station is traveling in space at a speed of 5230 m/s, and launches a satellite, would the initial speed of the satellite be 0 m/s or 5230 m/s?

A projectile is fired from 35ft above the ground level at an angle 35 deg. It hits the ground 100 ft away (horizontal distance). Find initial speed, travel time and max hight above the ground. can somebody solve this or point me in the right direction, thank you!

Homework Statement An Olympic basketball player shoots towards a basket that is 5.80 m horizontally from her and 3.05 m above the floor. The ball leaves her hand 1.94 m above the floor at an angle of 64.0 degree above the horizontal. What initial speed should she give the ball so that it...

In a ballistic pendulum an object of mass m is fired with an initial speed v_0 at a pendulum bob. The bob has a mass M, which is suspended by a rod of length L and negligible mass. After the collision, the pendulum and object stick together and swing to a maximum angular displacement theta as...

A baseball is thrown straight up with initial speed v(o). If air resistance cannot be ignored, when the ball returns to its initial height its speed is less than v(o). Explain why, using energy concepts. I am very confused as to why this is. A projectile has the same initial kinetic energy...

The radius of Mercury (from the center to just above the atmosphere) is 2440 km (2440103 m), and its mass is 0.31024 kg. An object is launched straight up from just above the atmosphere of Mercury. (a) What initial speed is needed so that when the object is far from Mercury its final speed is...

Homework Statement Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 4.20m/s . Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height 48.8m above...

I found the exact question I'm trying figure out here: https://www.physicsforums.com/showthread.php?t=91948 My exercises are all online and I can view the correct answer if I choose to (or if I answer incorrectly 5 times). Well, now I know the correct answer is 14.5 m/s. I still don't...

Calculating Initial speed? Homework Statement A ball is thrown straight up at ground level passes a height of 80.6m in 5.1s. The acceleration of gravity is 9.8m/s squared. What was its initial speed? answer in units of m/s Homework Equations What equation is the correct one to use...

[b]1. A truck covers 50.0 m in 9.00 s while smoothly slowing down to final speed 2.40 m/s. Find the trucks original speed. Find its accleration. [b]2. Homework Equations im using x = v0*t + 1/2 *a*t2 and v2 = v02 + 2*a*x I believe this is what the question gives me. Xo =...

Im having some problems with this question. Some help would be nice. Thanks. An egg is thrown nearly vertically upward from a point near the cornice of a tall building. It just misses the cornice on the way down and passes a point a distance 50.0 m below its starting point at a time 5.00 s...

I need some help with this problem if anybody can, please do, I need it! If a flea can jump straight up to a height of 0.520m, what is its initial speed as it leaves the ground...

[SOLVED] Initial Speed formula Homework Statement A bullet of mass m = 0.01 kg is fired into a ballistic pendulum of mass M = 2.0 kg as shown in Figure 1. The bullet remains in the block after the collision and the whole system rises to a maximum height of h = 8 cm. What is the bullet’s...

At the 18th green of the U. S. Open you need to make a 22.0 ft putt to win the tournament. When you hit the ball, giving it an initial speed of 1.27 m/s, it stops 6.00 ft short of the hole. (a) Assuming the deceleration caused by the grass is constant, what should the initial speed have...

A ball is projected horizontally from the edge of a table that is 1.00m high, and it strikes the floor at a point 1.20m from the base of the table. a) What is the initial speed of the ball? b) How high is the ball above the floor when its velocity vector make a 45.0° angle with the horizontal...

Another question, I may have more. The reason I'm here is to do some homework due soon. I'm also here to learn, but the sooner the better. A stone is dropped into a river from a bridge 43.9 m above the water. Another stone is thrown vertically down 1.00 s after the first is dropped. Both...

1) What is the initial speed v0 of the ball? 2)What is the height of the ball when the vertical speed is 1/2 of the initial speed vo? Thanks (I'm so sorry for my bad english. It's not my mother tongue)

This is a follow from a post i made yesterday. The question is: 2 particles are projected vertically up one after another from the same point at same initial speed u. T is the time interval between the 2 projections, where T<2u/g. Find what further time elapses before the particles collide...

I've been trying to figure this out for a while and it's due tomorrow...any help would be greatly appreciated. A .005 kg bullet is fired into a 4.0 kg pendulum bob initially at rest and becomes embedded in it. If the pendulum rises a vertical distance of 5.0 cm, calculate the initial speed of...

denote the initial speed of a cannon ball fired from a battleship as Vo. when the initial projectile angle is 45 degrees with respect to the horizontal, it gives a maximum range of R. the time of flight of the cannonball for this maximum range R is given by 1.t=(1/3^1/2)vo/g 2.t=3^1/2(vo/g)...

A baseball is seen to pass upward by a window 24 m above the street with a vertical speed of 9 m/s. The ball was thrown from the street. (a) What was its initial speed? m/s ( I keep getting 26 what equation am I supposed to use?) :confused: (b) What altitude does it reach? m (I don't...

A ball is thrown with an initial speed of 31 m/s at an angle of 45°.The ball is thrown from a height of 10 m and lands on the ground. (a) Find the time of flight. http://img153.echo.cx/img153/5338/showme2mp.gif I used the following formula: Yf = Yo + VoT - (1/2)GT^2 0 = 0 + (31...

Can someone just tell me where to start with this Q? I know it will have to solve some simult. eqs. to work it out. "A projectile is fired from the top of a cliff 150m high, and takes 10s to reach the base of the cliff after being fired." Find the initial speed. Thanks.

I need help! Some smart physics person, help me out here. A ball player hits a home run, and the baseball just clears a wall 18.5 m high located 140.0 m from home plate. The ball is hit at an angle of 32° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height...

Hello ! Wow, you guys are awesome, Thanks for all the help ! I've got another one I'm stuck on - ... I got part A.. the answer is 42.9082, but I can't get part B... ? help pleaaseee? thaaanks A projectile of mass 1.100 kg is shot straight up with an initial speed of 29.0 m/s. (a) How high...

1-Balls thrown by a juggler: A juggler performs in a room whose ceiling is at a height h above the level of his hands. He throws his first ball vertically upwards so that it just reaches the ceiling. At the instant when this happens, he throws his second ball upward with the same initial...

I need help with this. I don't know what equation to use. A 5.5g bullet is fired into a block of wood w/a mass of 22.6g. the wood block is initially at rest on a 1.5m tall post. after the collision, the wood block and bullet land 2.5m from the base of the post. how do you find the initial...

:smile: A 5.5 gram bullet is fired into a block of wood with a mass of 22.6 grams. The wood block is initially at rest on a 1.5 meter tall post. After the collision, the wood block and the bullet land 2.5 meters from the base of the post. Find the initial speed of the bullet.