A football of mass m = 1 kg is thrown at an initial velocity of v0 = 9 m/s at an angle of θ = 34° with respect to the horizontal. The ball reaches a maximum height of h. Let gravitational potential energy be zero at ground level. Give an expression for the initial velocity vector in rectangular form. Write your answer in terms of v0, θ, and the unit vectors i and j.

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

Which composition of water moves to begin a deepwater current?