# physics

posted by jt

a contestant projects a coin with a speed of 7 m/s at an angleof 60 degrees to the horizontal. When the coin leaves his hand, the horizontal distance between the coin and the dish is 2.8m. The coin lands in the dish. calculate the horizontal component of the initial velocity of the coin?

1. Damon

u = 7 cos 60 the whole time
so u = 7(1/2) = 3.5 m/s

end of problem

If there are more parts to this problem:

Vi = 7 sin 60 at the beginning

horizontal problem:
x = u t
2.8 = 7 (1/2) t
t = . 8 seconds in the air

t at top = .4 s

h = Vi (.4) - (9.81/2)(.4^2)

## Similar Questions

1. ### MATH

24 1c coins are set out in a row on a table. Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is replaced …
2. ### physics

A coin is placed 20 cm from the axis of a rotating turntable of variable speed. This speed is gradually increased and the coin remains fixed on the horizontal turntable until a rate of 36 rpm is reached. At this point, the coin slides …
3. ### physics

A coin is placed 26 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 120 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration …
4. ### physics

A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration …
5. ### physics

A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration …
6. ### physics

A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration …
7. ### physics

A coin is placed 33 cm from the center of a horizontal turntable, initially at rest. The turntable then begins to rotate. When the speed of the coin is 100 cm/s (rotating at a constant rate), the coin just begins to slip. The acceleration …
8. ### Physics

A coin is projected with speed 6m s-1 (metres per second) along the horizontal surface of a bench. The coefficient of friction between the coin and the surface is 0.7. Modelling the coin as a particle and assuming no air resistance, …
9. ### MATHS

24 1c coins are set out in a row on a table Then every 2nd coin is replaced by a 2c coin every 3rd coin is replaced by a 5c coin every 4th coin is replaced by a 10c coin every 5th coin is replaced by a 20c coin every 6th coin is replaced …
10. ### physics

Ten ,one rupees coin are put on the top of at each other on a table each coin has a mass 'm' give the magnitudes and direction of - 1. The force of seventh coin (counted from bottom) due to all the coins. 2. The reaction of 6th coin …

More Similar Questions