# physics

posted by .

A meter stick is held vertically above your hand, with the lower end between your thumb and first finger. On seeing the meter stick released, you grab it with these two fingers. You can calculate your reaction time from the distance the meter stick falls, read directly from the point where your fingers grabbed it.

If the measured distance is 18.2 cm , what is the reaction time?

t= s

• physics -

Assuming you mean 18.1 cm.
x = at^2/2 ==> t = sqrt(2x/a)
a = g = 9.81 m/s^2
2x = 0.362
t = 0.1921 s.
it is right but you enter 18.2
ok

## Similar Questions

1. ### physics

A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip. (Hint: Consider the stick to be a thin …
2. ### physics

A meterstick is held vertically above your hand, with the lower end between your thumb and first finger. On seeing the meter stick released, you grab it with those two fingers. You can calculate your reaction time from the distance …
3. ### Physics Mehanics

A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it hits the floor, assuming that the end on the floor does not slip. (Hint: Consider the stick to be a thin …
4. ### physics

A 65 g meter stick has two masses, each 250 g placed upon it. The first is located at 72 cm and the second located at 41 cm. Where should you place your finger if you wished to balance the meter stick?
5. ### physics

Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.470 m to y = 1.47 m. The second stick lies along the x axis from x = 0.320 m to x = 1.32 m. The third stick is positioned …
6. ### College Physics

A uniform meter stick of mass M has an empty paint can of mass m hanging from one end. The meter stick and the can balance at a point 19.9 cm from the end of the stick where the can is attached. When the balanced stick-can system is …
7. ### physics

Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.320 m to y = 1.32 m. The second stick lies along the x axis from x = 0.330 m to x = 1.33 m. The third stick is positioned …
8. ### Physics

A 1 kg mass is hung at the 0 mark of a meter stick and a 3 kg mass is hung at the 100 cm mark of the same meter stick. If the mass of the meter stick is 0.2 kg, at which of the following points of the meter stick could you balance …
9. ### Physics

A meter stick weighs 200 grams and is supported at the center. Three masses of 100, 200, and 150 grams are placed respectively, at the 10-cm, 20-cm and 60 cm points of the meter stick. To balance the meter stick, where must a 300 grams …
10. ### Physics

Find the torque on the meter stick for each situation. Ignore the mass of the meter stick. At 1/2 meter there is a 1000g weight. At 1 meter on the same stick there is a 500g weight. What is the torque?

More Similar Questions