Weblog on Physics

In un test d’urto, un’auto di massa m=1500 kg urta contro un muro. La velocità iniziale ha modulo v_i=15.0 m/s e quella finale v_f= 2.6 m/...

Tarzan, whose mass is 80.0 kg, swings from a 3.00-m vine that is horizontal when he starts. At the bottom of his arc,  he picks up 60.0-kg J...

Un cubetto di ghiaccio scende lungo uno scivolo, posto in un piano verticale, privo di attrito. Esce dallo scivolo con un angolo di 40°. ...

A cannon initially resting on a frictionless surface of mass m 1 = 800 kg (when unloaded) is loaded with a “shot” of mass m 2 = 10.0 kg. T...

A flying squid (family Ommastrephidae) is able to “jump” off the surface of the sea by taking water into its body cavity and then ejecting t...

A 45.0-kg girl is standing on a 150-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionles...

A rifle with a weight of 30 N fires a 5.0-g bullet with a speed of 300 m/s. (a) Find the recoil speed of the rifle. (b) If a 700-N man holds...

A 730-N man stands in the middle of a frozen pond of radius 5.0 m. He is unable to get to the other side because of a lack of friction betwe...

A 40.0-kg child stands at one end of a 70.0-kg boat that is 4.00 m long. The boat is initially 3.00 m from the pier. The child notices a t...

A 5.00-g bullet moving with an initial speed of 400 m/s is fired into and passes through a 1.00-kg block, as in Figure. The block, initially...

Un proiettile di 50 g si conficca in un blocco di 500 g, che dopo l'urto, comprime una molla con una compressione massima di 50 cm. Il b...

Un proiettile di massa m ha velocità v orizzontale prima di passare attraverso un blocco di paraffina di massa M che è fermo sul piano. Tra ...