At a playground, a 26-kg child sits on a spinning merry-go-round, as shown from above in (Figure 1). The merry-go-round completes one revolution every 6.2 s, and the child sits at a radius of r=1.2m. What is the force of static friction acting on the child?

Explain what makes a passenger in a turning car slide toward the door. critical thinking

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.