A 30 kg is placed on a skateboard and pushed across the room with a velocity of 4 m/s. the pusher applies more force, increase the velocity to 10 m/s. How much work was done to move the box ?

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

Orque can be calculated by multiplying the force (n) applied at 90? to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n? m. if the force (at 90? to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?

What is the measurement of how fast an object moves relative to a reference point?