Answer:
The person going to the highest apartment door.
Explanation:
Since gravitational potential energy, U = mgh where h is the height above the ground. The person with the highest gravitational potential energy would be the person going to the highest apartment door if we assume that their masses are the same.
Answer:5.45X10^3m
Explanation:So use the formula,v= fλ
3X10^8=5.5X10^4λ what Im saying is divide both and u should get 5454.54m but do sig figs to get answer
Answer:
speed of the car before the brakes were apply is 12.35 m/s
Explanation:
given data
accident measured distance = 73 feet = 22.25 m
to find out
speed of car before the brakes
solution
we consider here coefficient of kinetic friction between the road and the tires is 0.35
and we take speed of the car just before skidding = u
and final speed of car will be v = 0
now we apply here work energy theorem
so
0.5 mv² - 0.5 mu² = (- coefficient of kinetic friction × mass × g ) distance .......1
0.5( v² -u² ) = (- coefficient of kinetic friction × g ) distance
put here value and we get
0.5 ( 0 - u² ) = (- 0.35 × 9.8 ) 22.25
solve it we get
u = 12.35
speed of the car before the brakes were apply is 12.35 m/s
The velocity of the wood board which is resting on very smooth ice in the middle of a frozen lake relative to this ice is 0.905 m/s
- What is conservation of momentum:
It states the amount of momentum remains constant
Momentum of a moving body is the product of mass times velocity.
Formula for momentum:
When the two objects collides, then the initial collision of the two body is equal to the final collision of two bodies by the law of conservation of momentum.
here,
mass of wood, m=58.5 kg
mass of boy, M=41.7 kg
velocity of the boy V=1.27 m/s
Thus,
The conservation of momentum,
m*v = M*V
substituting the value,
(58.5*v) = 1.27* 41.7
v = 52.95 / 58.5
v = 0.905 m/s
Thus, the velocity of the wood board which is resting on very smooth ice in the middle of a frozen lake relative to this ice is 0.905 m/s.
Learn more about the conservation of momentum here;
<u>brainly.com/question/3920210</u>
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An important difference between a universal and a split-phase motor is that the split-phase motor has
A. two brushes attached to the stator.
B. a single coil formed on the rotor.
<u>C. two windings on the stator. </u>
D. an armature with a commutator.
