1) 5.79 s
2) 98.4 ft/s
Explanation:
1)
The motion of the car is a uniformly accelerated motion (it means it travels with constant acceleration), so we can find the time it takes for the car to stop by using the following suvat equation:
where
s is the distance travelled
v is the final velocity
t is the time
a is the acceleration of the car
In this problem we have:
s = 285 ft is the distance travelled
is the acceleration of the car (negative since the car is slowing down)
v = 0 ft/s is the final velocity of the car, since it comes to a stop
Solving for t, we find:
2)
The initial speed of the car can be found by using another suvat equation, namely:
where
v is the final speed
u is the initial speed
a is the acceleration
t is the time
In this problem, we have:
v = 0 is the final speed of the car
is the acceleration of the car (negative since the car is slowing down)
t = 5.79 s is the total time of motion (found in part 1)
Therefore, the initial speed of the car is:
Answer:
a
b
Explanation:
From the question we are told that
The height of the helicopter is 
The height of the bed of the truck is 
The speed of the truck is 
Generally the distance between the truck bed and the helicopter is mathematically represented as
=> 
=> 
Converting to meters
Generally the time at which the helicopter should drop the package is mathematically represented as
Generally distance of the helicopter from the drop site at time t = 0 s is
=> 
=>
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Answer:
from W-Z.. i think on a swing you get your most potential energy at W and Z is where you go up so Z would be where the kinetic energy increased and W is where potential energy decrease
Explanation:
hope this helps
Answer: Potential energy is real and is stored within matter, though a force must be applied to an object in order for it to store potential energy.
Explanation:
