For a ground-to-ground projectile fired with speed u at angle θ, which pair correctly gives its minimum speed and the point where this minimum occurs?
Options

Question

For a ground-to-ground projectile fired with speed u at angle θ, which pair correctly gives its minimum speed and the point where this minimum occurs?

G1 Physics · Accepted Answer

The horizontal component remains constant: vₓ=u cosθ. The vertical component is zero only at the highest point. Therefore the speed is smallest there and equals vₘᵢₙ = u cosθ.