The Drawing Shows Two Planes Each About To Drop An Empty Fuel
PHY 131: Tutorial Problems
Tutorial 5: 16 – 20 March 2020
(A) A skateboarder shoots off a ramp with a velocity of 6.6 m/s, directed at an angle of 58° above the
horizontal. The end of the ramp is 1.2 m above the ground. Let the x axis be parallel to the ground, the +y
direction be vertically upward, and take as the origin the point on the ground directly below the top of the
ramp.
(a) Calculate how high above the ground is the highest point that the skateboarder reaches.
(b) When the skateboarder reaches the highest point, calculate how far is this point horizontally from
the end of the ramp
[Answer: (a) +2.8 m above the ground, and (b) 2 m]
(B) A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball
leaves the club at a speed of 14.0 m/s at an angle of 40.0° above the horizontal. It rises to its maximum
height and then falls down to the green. Ignoring air resistance, calculate the speed of the ball just before
it lands.
[Answer: 11.7 m/s ]
(C) The drawing shows two planes each about to drop an empty fuel tank. At the moment of release each
plane has the same speed of 135 m/s, and each tank is at the same
height of 2.00 km above the ground. Although the speeds are the
same, the velocities are different at the instant of release, because
one plane is flying at an angle of 15.0° above the horizontal and the
other is flying at an angle of 15.0° below the horizontal. Calculate
the magnitude and direction of the velocity with which the fuel tank
hits the ground if it is from (a) plane A and (b) plane B. In each
part, give the directional angles with respect to the horizontal.
[Answer: (a) 239 m/s at an angle of 57.1 above the horizontal,
and (b) 239 m/s at an angle of 57.1 above the horizontal]
(D) A ball is thrown upward at a speed v0 at an angle of 52° above the horizontal. It reaches a maximum height
of 7.5 m. Calculate how high would this ball go if it were thrown straight upward at speed v 0.
[Answer: 12 m]
The Drawing Shows Two Planes Each About To Drop An Empty Fuel
Source: https://www.studocu.com/en-za/document/university-of-pretoria/physics-for-biology-students/tutorial-5-students/8089414
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