Answer:
1.628 
Explanation:
Anywhere in the universe, In a closed system, <u>Conservation of energy</u> is applicable.
In this case
Neil is initially on the surface of moon and has a velocity of 1.51 
in upward direction.
⇒He has Kinetic energy= 
= 
J
But with respect to the surface of the moon,
where m=mass of moon
v=velocity of Neil
He has Potential energy= 
=0 J
At the highest point of his jump, his velocity =0
⇒ Kinetic energy=
=0 J
His Potential energy with respect to the surface of moon=
=
where m=mass of moon
g= gravitational acceleration on moon
h=height from moon's surface
By Conservation Energy Principle
+=+
+0=0+
=
= 
J= 
⇒ g = 
= 1.628
Answer:
389 kg
Explanation:
The computation of mass is shown below:-
Where K indicates spring constant
m indicates mass
For the new time period
Now, we will take 2 ratios of the time period
= 0.889 kg
Since mass to be sum that is
= 0.889 - 0.500
0.389 kg
or
= 389 kg
Therefore for computing the mass we simply applied the above formula.
A. How much work is being done to hold the beam in place?
Work is the product of Force and Displacement. Since there
is no Displacement involved in just holding the beam in place, hence the work
is zero.
B. How much work was done to lift the beam?
In this case, force is simply equal to weight or mass
times gravity. Hence the work is:
Work = weight * displacement
Work = 500 lbf * 100 ft
Work = 50,000 lbf * ft
C. How much work would it take if the steel beam were
raised from 100 ft to 200ft?
The displacement is still 100 ft since 200 – 100 = 100 ft,
hence the work done is still similar in B which is:
<span>Work = 50,000 lbf * ft</span>
Answer:
Explanation:
When we accelerate in a car on a straight path we tend to lean backward because our lower body part which is directly in contact with the seat of the car gets accelerated along with it but the upper the upper body experiences this force later on due to its own inertia. This force is accordance with Newton's second law of motion and is proportional to the rate of change of momentum of the upper body part.
Conversely we lean forward while the speed decreases and the same phenomenon happens in the opposite direction.
While changing direction in car the upper body remains in its position due to inertia but the lower body being firmly in contact with the car gets along in the direction of the car, seems that it makes the upper body lean in the opposite direction of the turn.
On abrupt change in the state of motion the force experienced is also intense in accordance with the Newton's second law of motion.
