Answer:
Explanation:
Given data
work W= -5.10 10^3 J
mass m= 71kg
final height of slide h2= 12.7m
initial height of slide h1=0m
initial velocity v1= 0m/s
final velocity v2=?
Step two:
required
Final velocity
The work-energy theorem is expressed as'
make V2 subject of formula we have final speed
substitute our given data we have
The student going at 10.27m/s
The mystery behind the see-saw motion lies in force and genesis of counterforce.
Balanced Teeter totter can be achieved by placing equal masses or length adjustment (betwen pivot and mass) for varying mass.
Explanation:
Teeter totter is a wonderful manifestation of physics principles in crude form.
The working of Teeter totter can be explained as-
The whole set-up (Teeter totter) is balanced on a pivot or fulcrum. When either of its edges/sides is loaded, it moves down under the impact of its mass & gravity (force=m*gravity).
Equal and opposite counterforce acts on the other end of the Teeter totter to balance the effect of the previously applied force. As a result of this, the other side is raised upwards in the air.
As a result of this the net force remains balanced on either side (considering similar masses are on both ends of the Teeter totter)
For a Teeter totter to be balanced there are two conditions-
- When both masses are same- When both sides are loaded with an equal mass, then eventually Teeter totter would come to rest by hanging midway.
- When both masses are different then the occupants need to adjust such way that the heavier mass is near to the pivot while lighter mass is at the edge.
Answer:
The answer is true, when performing Tai Chi, The breathing technique utilized is called “Belly Breathing”
Explanation:
Answer:
Pa = kg/m.s²
Explanation:
Pascal (Pa) is the S.I unit of pressure. The formula of pressure is given as follows:
Pressure = Force/Area
The S.I Unit for force is Newton (N) and for Area is (m²). Therefore, the S.I Unit of Pressure will be:
Pressure = N/m²
Therefore, it will be equal to Pascal (Pa)
Pa = N/m²
but, the formula for force is given by Newton's 2nd Law:
Force = (mass)(acceleration)
using S.I Units:
N = (kg)(m/s²)
Therefore,
Pa = [(kg.m/s²)/m²]
<u>Pa = kg/m.s²</u>
v_f=0
(1)
having into account that the total time spent in air till the cap came to her hands is Ttotal=2*t
where t is the time which the cap spent to reach the heighest point or the maximun height. so;
Ttotal=2second
t=1sec
we then replace t into the equation(1);
this is the initial velocity with which the cap was thrown