Answer: 3.55 s and 0.83 s
Explanation:
The height (in feet) of the softball is given by:
s(t)=-16t²+70t+3
we need to find the time when the ball is 50 feet above the ground:
⇒50 = -16t²+70t+3
we need to solve the quadratic equation
⇒16t²-70t+47 = 0
This gives two values of time: 3.55 s and 0.83 s
Answer:
Maximum force will be 29040 N
Explanation:
We have given mass of the piston m = 1.5 kg
Amplitude A = 10 cm = 0.1 m
Angular speed 
We know that angular speed is given by 
Squaring both side
k = 290400 N/m
Now force is given by 
Answer:0.83 watts
Explanation:
Voltage=10v
Resistance=120ohm
power=(voltage)^2 ➗ resistance
Power=10^2 ➗ 120
Power=(10x10) ➗ 120
Power=100 ➗ 120
Power=0.83watts
For this case, what we can do is use the Pythagorean theorem to find the magnitude of the displacement of the car.
We have then
From here, we clear the value of d.
We have then:
Rewriting:
Answer:
The magnitude of the car's displacement is:
d = 20 miles
Yes, all objects are affected by gravity. Newton's law of universal gravity states that <span>any two bodies in the universe attract each other
with a force that is directly proportional to the product of their
masses and inversely proportional to the square of the distance between
them. Therefore we know that gases, and every other atom in the universe, is subject to gravity.
We also know this, as if they weren't affected by gravity, the Earth wouldn't have an atmosphere!
</span>
