You do 1,500j of work in using a hammer. the hammer does 825j of work on a nail. what is the efficiency of the hammer?

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?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?