Atennis ball of mass m = 0.060 kg is traveling with a speed of 28 m/s and θ = 35 degrees. it strikes a wall and bounces off with a speed of 28 m/s. what is the magnitude of the force, in newtons, exerted on the ball if the collision time is 0.1 s? what direction was the force exerted by the wall?

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2