Answer:
(C) a circle starting at time t=0 on the positive x axis
Explanation:
particle's position is
r(t)=R[cos(ωt)i^+sin(ωt)j^] =Rcos(ωt)i^+Rsin(ωt)j^
this is a parametric equation of a circle, because the axis at x and y are the same = R.
for t=0:
r=Ri^
so: circle starting at time t=0 on the positive x axis
On the other hand:
The value of the magnitude of the acceleration is:
we can recognise that this represent the centripetal acceleration.
Answer:
The phenomenon of total internal reflection of light is used in many optical instruments like telescopes, microscopes, binoculars, spectroscopes, periscopes
Answer:
The block will be move in to right side.
Explanation:
Given that,
Mass of block = 2 kg
First force = 3 N
Second force = 4 N
We need to calculate the acceleration
For first force,
Using newton's second law
Put the value into the formula
We need to calculate the acceleration
For second force,
So, we can say that the block will be move to right side because the acceleration is maximum in to right side.
Hence, The block will be move in to right side.
Answer
given,
Car A weight = 1515 lb traveling eastward
Car B weight = 1125 lb traveling westward at a speed of 45 mph
distance to taken to stop the vehicle = 22.5 ft
1 ft = 0.000189394 mile
22.5 ft = 0.000189394 x 22.5 = 0.0043 mile
coefficient of friction = 0.750
Energy after the collision
using momentum conservation
Weight is the measurement of the pull of gravity on an object, while mass is the measurement of the amount of matter that an object contains.