A bowling ball has a mass of 7.2 kg and a weight of 70.6 N. It moves down the bowling alley at 1 m/s and strikes a pin with a fo
2 answers:
Answer:
<h2>15N</h2>Explanation:
The choices for this question are
- 7.2 N
- 15.0 N
- 70.6 N
- 85.6 N
Givens
However, to solve this we just need to use Newton's third law which states: <em>"When an object exerts a force on another object, the second object will exert an equal and opposite force to the first object".</em>
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If the bowling ball strikes a pin with a force of 15N, then the pin will exert the same 15N on the bowling ball, but with the opposite direction. If the bowling force is positive, then the pin force will be negative.
Therefore, the right answer is the second choice 15N.
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Answer:
Question 1)
a) The speed of the drums is increased from 2 ft/s to 4 ft/s in 4 s. From the below kinematic equations the acceleration of the drums can be determined.
This is the linear acceleration of the drums. Since the tape does not slip on the drums, by the rule of rolling without slipping,
where α is the angular acceleration.
In order to continue this question, the radius of the drums should be given.
Let us denote the radius of the drums as R, the angular acceleration of drum B is
α = 0.5/R.
b) The distance travelled by the drums can be found by the following kinematics formula:
One revolution is equal to the circumference of the drum. So, total number of revolutions is
Question 2)
a) In a rocket propulsion question, the acceleration of the rocket can be found by the following formula:
b)