Answer:
a) 400.4Joules
b) 262.69Joules
Explanation:
Work is said to be done if the force applied to an object cause the object to move through a distance
Workdone = Force × Distance
Given
Force = 76N
Distance= 5.2m
Work done = 77 × 5.2
Work done = 400.4Joules
b) If the force is exerted at an angle of 41°
Work done = Fdsin theta
Work done = 77(5.2)sin41
Work done = 400.4sin41
Work done = 262.69Joules
As the metal expands as does the road bed so neither really effevts those foing over the bridge. as it is hot the metal will expand and so will most tarmac on roads.
Stars with higher luminosity and temperature have higher masses as massive stars require higher core temperatures to remain stable.
Answer:
0.2v
Explanation:
Data given,
Diameter=18.5cm
Hence we can calculate the radius as D/2=18.5/2=9.25cm
radius=9.25cm/100=0.0925m
The area is calculated as
magnetic field, B=1.3T
time,t=0.18s
The flux is expressed as
since the loop is parallel, the angle is 0
Hence we can calculate the flux as
to determine the emf induced in the loop, we use Faraday law
Note the voltage is not negative but the negative sign shows the current flows in other to oppose the flux
Answer: |F| = 1.28 x 10⁵ N
Explanation:
an impulse results in a change of momentum
FΔt = mΔv
F = m(vf - vi)/t
F = 2000(0 - 32) / 0.5
F = -128,000
|F| = 1.28 x 10⁵ N
