Answer:
A) the maximum acceleration the boulder can have and still get out of the quarry
B) how long does it take to be lifted out at maximum acceleration if it started from rest
Explanation:
A)
let +y is upward. look below at the free body diagram. the mass M refers to the combined mass of the boulder and chain.
the weight of the chain is: 
and maximum tension is 
total mass and weight is :
∑
B)
maximum acceleration
using 
to solve for t
Answer:
The correct option is a
Explanation:
From the question we are told that
The mass of the block is 
The height of the vertical drop is 
Generally from the law of energy conservation , the potential energy at the top of the slide is equal to the kinetic energy at the point after sliding this can be mathematically represented as
i.e 
=> 
=> 
=> 
Explanation:
because the acceleration is negative, this indicates a deceleration (or slowing down) . Hence we can say that:
The car is decelerating (slowing down), i.e its velocity is decreasing, at a constant rate of 5m/s².
<u>Answer;</u>
= 20 ohms
<u>Explanation;</u>
- According to the Ohm's law, the current through a conductor is directly proportional to the potential difference if other environment conditions are kept constant.
Therefore; I α V
Hence; V = IR, where R is the constant, called the resistance
Therefore; R = V/I
R = 6.0 /0.3
<u> = 20 Ohms</u>
