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CLAS Physics 6a
Ch3 – In Class Worksheet
Zero Launch Angle
1) A person skateboarding with a constant speed of 1.30m/s releases a ball from
a height of 1.25m above the ground. Given that that x
0
= 0 and y
0
=1.25m, find x
and y for (a) t=0.250s and (b) t= 0.55s.
c) Find the velocity, speed and direction
of motion of the ball at t=0.500s.
2) Two youngsters dive off an overhang into a lake. Diver 1 drops straight down,
diver 2 runs off the cliff with an initial horizontal speed v
0
. Is the splashdown
speed of diver 2 (a) greater than, b) less than or c) equal to the splashdown
speed of diver 1?
3) A mountain climber encounters a crevasse in an ice field. The opposite side of
the crevasse is 2.75 m lower, and is separated horizontally by a distance of
4.10m. To cross the crevasse, the climber gets a running start and jumps in the
horizontal direction. a) What is the minimum speed needed by the climber to
safely cross the crevasse? If the climber’s speed is 6.00m/s, b) where does the
climber land, and c) what is the climber’s speed on landing?
4) In the previous example, if the height h is increased in but the width w remains
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This note was uploaded on 09/09/2011 for the course PHYS 6a taught by Professor Stanek during the Spring '07 term at UCSB.
 Spring '07
 STANEK
 Work

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