Making an angle of 50.0° with the horizontal, a cannon fires a ball with a muzzle speed of 100.0 m/s. a. What are the initial vertical and horizontal speeds? (64.3m/s horizontal & 76.6m/s vertical) b. What's its peak altitude? (299m) c. On the way up, how long will it take to reach an altitude of 100.0 m? (1.42s)

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Projectile Launched at angles
(from Hecht textbook)
Do you work on separate paper.
1. A silver dollar is thrown downward at an angle of 60.0° below the horizontal from a bridge 50.0 m above
a river. If its initial speed is 40.0 m/s, where and at what speed will it strike the water? Ignore the effects
of the air. (50.8m/s)
2. A baseball is hit as it comes in, 1.30 m over the plate. The blast sends it off at an angle of 30.0° above
the horizontal with a speed of 45.0 m/s. The outfield fence is 100.0 m away and 11.3 m high. Ignoring
aerodynamic effects, will the ball clear the fence? (25.5m vertical displacement - it clears the fence)
3. Making an angle of 50.00 with the horizontal, a cannon fires a ball with a muzzle speed of 100.0 m/s.
a. What are the initial vertical and horizontal speeds? (64.3m/s horizontal & 76.6m/s vertical)
b. What's its peak altitude? (299m)
c. On the way up, how long will it take to reach an altitude of 100.0 m? (1.42s)
Transcribed Image Text:Projectile Launched at angles (from Hecht textbook) Do you work on separate paper. 1. A silver dollar is thrown downward at an angle of 60.0° below the horizontal from a bridge 50.0 m above a river. If its initial speed is 40.0 m/s, where and at what speed will it strike the water? Ignore the effects of the air. (50.8m/s) 2. A baseball is hit as it comes in, 1.30 m over the plate. The blast sends it off at an angle of 30.0° above the horizontal with a speed of 45.0 m/s. The outfield fence is 100.0 m away and 11.3 m high. Ignoring aerodynamic effects, will the ball clear the fence? (25.5m vertical displacement - it clears the fence) 3. Making an angle of 50.00 with the horizontal, a cannon fires a ball with a muzzle speed of 100.0 m/s. a. What are the initial vertical and horizontal speeds? (64.3m/s horizontal & 76.6m/s vertical) b. What's its peak altitude? (299m) c. On the way up, how long will it take to reach an altitude of 100.0 m? (1.42s)
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