Answer:
A) A circle starting at time t=0 on the positive x axis
.
B) .
C) v(t)=Rω[-sin(ωt)i^+cos(ωt)j^]
D) v(t)=Rω
E) a(t)=-R[cos(ωt)i^+sin(ωt)j^]
F) a(t)=-r(t)
G) (There is no Part G)
H) a=/R
Explanation:
The particle's motion is a circle starting at t=0 on the positive x axis since r(0)=R[cos(0)i^+sin(0)j^]=R[i^]. The particle first cross the negative x axis when r(t)=-R[i^], which means cos(ωt)=-1, or , so we have . The particle's velocity is the derivative of its position, so v(t)=Rω[-sin(ωt)i^+cos(ωt)j^], while its speed is the magnitude of that vector, v(t)=Rω (since the magnitude of the vector -sin(ωt)i^+cos(ωt)j^ is 1). The particle's acceleration is the derivative of its velocity, so a(t)=-R[cos(ωt)i^+sin(ωt)j^], or in terms of its position a(t)=-r(t), and its magnitude using the expression obtained for the speed of the particle, a=R=R/=/R.
A or C , they both fit but i don’t know the right answer lol
Answer:
Impulse is defined as change in momentum of an object divided by time interval.
at t= 0s
initial velocity = u , initial momentum = mu
at some time t .
final velocity = V, final momentum= mv.
now, change in momentum= ( final - initial) = ( mv-mu)
time interval = (t-0) = t
impulse force = (mv-mu)/ ( t)
Ft = (mv-mu) proved .
this law is known as Newton's second law.
Answer:
N/l = 104
Explanation:
Energy stored in the inductor is given by the formula
now we have
now we have
now we have
now winding density is turns per unit length