# physics

posted by .

When I toss a ball straight up, it travels up, stops, and then falls back to by hand. When it stops to change direction, how long is it stopped?

• physics -

The veloicty is linear

As an example

V=10- 10t so at t=1, velocity is zero. Is it zero at .999999999999 or 1.0000000001 sec? No.

• physics -

What does that tell me? Just as a point in space has no dimension while a line does, is there a period of time that has no "length",ie ifinantely short?

## Similar Questions

1. ### Physics

A bus travels 280 km south along a straight path with an average velocity of 88 km/hr to the south. The bus stops for 24 min, then it travels 210 km south with an average of 75 km/hr to the south. A. How long does the total trip last?
2. ### Physics

A baseball has a mass of .145 kilograms. A pitcher's fastball travels at 42 m/s. How much force is applied to the ball if the catcher stops the ball in .05 sec?
3. ### physics

You throw a 134 g ball straight up to a height of 43.0 m. (a) Assume that the displacement of your hand is 0.70 m as you throw the ball straight up. How long is the ball is in your hand?
4. ### Physics

A juggler has a set of balls that she can toss into the air. If it takes her 0.2 s to transfer a ball from the receiving hand to the launch hand and she is able to throw a given ball straight up with a maximum speed of 10 m/s how many …
5. ### Physics

A boy's hand pushes a ball through a vertical distance of 1.45 m as he throws the ball straight upward. Once the ball leaves his hand it travels an additional 22 m (straight up) before returning to earth. Find the acceleration of the …
6. ### physics

You hit a 0.2 kg golf ball up at 40o from the horizontal. It travels for 4.86 s and stops on an elevated green 10 m above its initial height traveling down at an angle of 35.4o below the horizontal. What is the total impulse on the …
7. ### Physics

An object has a initial velocity of 10 m/s in the positive x direction. Under a constant acceleration it stops after undergoing a displacement of 148.3 m in the positive x direction. Because it is still under the same acceleration …
8. ### Physics

An object has a initial velocity of 10 m/s in the positive x direction. Under a constant acceleration it stops after undergoing a displacement of 148.3 m in the positive x direction. Because it is still under the same acceleration …
9. ### Chemistry/Physics

The kinetic energy of a rolling billiard ball is given by KE=1/2mv2. Suppose a 0.17-kg billiard ball is rolling down a pool table with an initial speed of 4.7m/s . As it travels, it loses some of its energy as heat. The ball slows …
10. ### physics

1)Johnny Football throws a football straight up in the air. It travels to a maximum height of 7.1 m. It then falls and is caught at the exact location where it was released 2.4 seconds later. a) What was the ball's average speed during …

More Similar Questions