Answer:
Part a)
Part b)
Part c)
equation of position in x direction is given as
equation of position in y direction is given as
Part d)
Part e)
H = 88.5 m
Part f)
t = 1.2 s
Explanation:
As we know that ball is projected with speed
v = 8.10 m/s at an angle 18 degree below the horizontal
so we will have
Part a)
Since it took t =4 s to reach the ground
so its initial y coordinate is given as
Part b)
components of the velocity is given as
Part c)
equation of position in x direction is given as
equation of position in y direction is given as
Part d)
distance where it will strike the floor is given as
Part e)
Height from which it is thrown is same as initial y coordinate of the ball
so it is given as
H = 88.5 m
Part f)
time taken by ball to reach 10 m below is given as
t = 1.2 s
Answer:
Magnetic induction cannot be done in a wood because it is not a magnetic person like iron , nickel,and cobalt
Answer:
D) follows a circular path
Explanation:
This is because the magnetic force F on the charge, q due to the magnetic field B with velocity vector v perpendicular to it, equals the centripetal force acting on the charge.
So, F = Bqv = mv²/r.
So it follows a circular path.
velocity = traveled distance ÷ time of the traveled distance is seconds
velocity = 600 ÷ 60
velocity = 10 m/s
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Kinetic Energy = 1/2 × mass × ( velocity )^2
KE = 1/2 × 60 × ( 10 )^2
KE = 30 × 100
KE = 3000 j
Answer:
work done by tension force on the twirled stone must be ZERO always
Explanation:
As we know that work done by a force on an object is given as
here we know that
= angle between force and displacement
now we know that tension in the string and displacement of the object is always perpendicular to each other when the rock is twirled in circular path.
so we can say for this motion of the stone
so work done by tension force on the twirled stone must be ZERO always
