Answer:
a) t = 1.75 s
b) x = 31.5 m
Explanation:
a) The time at which Tom should drop the net can be found using the following equation:
Where:
: is the final height = 0
y₀: is the initial height = 15 m
g: is the gravity = 9.81 m/s²
: is the initial vertical velocity of the net = 0 (it is dropped from rest)
Hence, Tom should drop the net at 1.75 s before Jerry is under the bridge.
b) We can find the distance at which is Jerry when Tom drops the net as follows:
Then, Jerry is at 31.5 meters from the bridge when Jerry drops the net.
I hope it helps you!
Complete Question
The diagram for this question is shown on the first uploaded image
Answer:
, 
Explanation:
From the question we are told that
The initial velocity of the arcade ball is 
The time taken by the ball to enter the basket is 
Generally the x -component of the initial velocity is
=> 
Generally the y -component of the initial velocity is
=> 
Generally the distance x is mathematically represented as
=> 
=>
Generally from kinematic equation the distance y is mathematically represented as
=> 
=>
The heat absorbed is calculated using the following equation:
Q = mCΔT
Q = heat absorbed
m = mass = 66 g
C = specific heat of iron = 0.449 J/g.°C
ΔT = temperature change = 20 - 7 =13°C
Therefore,
Q = 66*0.449*13 = 385.242 J
Her displacement would be -3 blocks
displacement = final position - initial position
