Top answers

Why is an object that moves in a circular path accelerating when it has constant speed?

Think about the definition of acceleration - it is the rate of change of velocity . Your statement that the object's speed is constant is correct, can you think about why the object's velocity isn't constant...
IS
Answered by Inigo S. • Physics tutor
2662 Views

What is the angular velocity of a person standing on the surface of the earth. Give your answer in radians per second

Angle through which the earth rotates = 2pi Time to do so = 24 60 60 = 86400s Angular velocity = 7.3x10 -5 rads -1
WF
Answered by William F. • Physics tutor
10301 Views

How can I describe the motion of an object falling, due to gravity, through a fluid? And when does the object reach terminal velocity?

Lets consider a skydiver jumping from an airplane. Once the skydiver has let go of the plane they are pulled towards the earth due to gravity. By Newton’s second law: F = ma, the sky diver begins to accelera...
AD
Answered by Ailsa D. • Physics tutor
10201 Views

A ball is thrown at speed u = 10.0 m/s at an angle of 30.0 degrees to the ground at height, s = 0. How far does the ball travel horizontally from its starting position? (Ignore air resistance and taking g = 9.81 m/s^2)

First, find the speed of the ball in the horizontal (x) and vertical (y) directions. u x = u cos(30) = 8.66m/s and u y = u sin(30) = 5 m/s. Using an appropriate suvat equation find the time until the ball la...
AT
Answered by Alex T. • Physics tutor
2865 Views

How do I find an area in m^2 when I'm given lengths in cm?

its tempting when we're given a length in cm - let's use a radius for example - to simply square the number of cm. However this can lead you into traps. Take a circle with radius 5cm. We know that A=pi r^2. ...
LM
Answered by Lauren M. • Physics tutor
2873 Views