A child of mass 25kg sits on a merry-go-round. The child is seated 4m from the centre of the merry-go-round and period of the motion is 27.3s. Calculate:

a) the acceleration of the child

b) the centripetal force

Density is mass / volume. (D = m/V) A loaf of bread has a volume of 2270 cm3 and a mass of 454 g. What is the density of the bread? g/cm3

An iron nail is made up of particles. What is true about the particles?

What is d formula for calculating mechanical power?

A ball is dropped from a height of 20 meters. At what height does the ball have a velocity of 10 meters/second? A. 5.1 meters B. 9.8 meters C. 25 meters D. 15 meters

The Tacoma Narrows Bridge collapsed due to A. beats. B. frequency modulation. C. destructive interference. D. resonance.

Fill in the blanks to complete each statement about the heating of Earth's surface. Earth takes in thermal energy from the Sun in a process called Sunlight strikes Earth's surface at different angles. This angle is called the angle of Done Intro

A 2.0-kg block is on a perfectly smooth (frictionless) ramp that makes an angle of 30^/circ30 ∘ with the horizontal. What is the force of the ramp on the block?

What is the difference between negative displacement and negative velocity?

How to use Da Vinci flying pedulum clock

A 7.00 kg mass is being pulled by a 53.8 n force what is the acceleration