12. Ett metallblock (1,2 kg) glider med konstant hastighet längs en bordsyta. Blocket är via en lättrörlig
trissa fast vid en vikt (300 g) som drar i blocket.
1,2 kg
300 g
Bestäm friktionstalet mellan blocket och bordet.
Svar:
С
с

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

Which describes increasing the efficiency of energy resource

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?