Overview
A ballistic experiment can be performed by shooting a bullet of mass m0=0.01kg into a wooden block of mass M that initially is at rest on a frictionless support of height h=1.13m.
The bullet remains in the block after the impact.
The experiment ran twice with the different masses of the block (M1=1.09kg and M2=0.66kg) and the block land at different distances (d1 and d2).
The difference in the distances is ?d=1.2m.
Use the given information to calculate the speed (m/s) of the bullet if it remains in block in each experiment. Answer: 432.64
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The big claw snapping shrimp has one big claw that snaps shut with remarkable speed. It can move 90° angle in t=1.3 ms.
If our shrimp's claw rotates through a 90° angle in t=33ms (we assume that the claw is 1.4cm long) and it undergoes a constant angular acceleration.
What is the tangential acceleration of the tip of the claw in m/s2? Answer: 20.19
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The big claw snapping shrimp has one big claw that snaps shut with remarkable speed. It can move 90° angle in t=1.3 ms.
If our shrimp's claw rotates through a 90° angle in t=164ms (we assume that the claw is 1.3cm long) and it undergoes a constant angular acceleration.
What is the angular acceleration in rad/s2?
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During an experiment, an object is placed on a disk that rotates about an axle through its center, as shown in Figure 1.
The disk is a distance R= 0.10 m
from the center and rotates with a constant tangential speed of 0.60 m/s
A free body diagram of the forces exerted on the block is shown in Figure 2 with an unknown force of friction.
What is the force of friction (in Newtons) exerted on the object? Answer .22
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A 991kg satellite is in a circular orbit about Earth at a height h=2,781km above Earth.
Assume Earth's mean radius is RE=6,397km , and Earth's mass is M=5.97×1024 kg .
Use G = 6.67×10-11 m3 kg-1 s-2 for Universal Gravitational Constant.
Find the time it takes this satellite to go around Earth one time (this time is called period) measured in hours. Answer: 2.43
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The graph shows the angular velocity-versus-time graph for the propeller of a ship.
What is the number of total revolutions the propeller makes in the first 8 seconds if wmax= 12rad/s?
Assume that after the ship reaches its maximum velocity it keeps moving at that velocity. Answer : 105.52