- A 1000 mathrm(~kg) car is traveling 12 mathrm(~m) / mathrm(s) to the right when it collides head-on with a 2000 mathrm(~kg) pickup truck traveling 8 mathrm(~m) / mathrm(s) to the left. The vehicles lock together inelastically following the collision. Which direction will the vehicles travel after the collision? left
- Pregunta 8 (10 puntos) Technician A says that as voltage increases and resistance remains constant, current increases. Technician B says that as voltage decreases and resigifance remains constant, the number of free electrons flowing through a circuit decreases. Who is right? a A only. b B only. C Both A and B d Neither A nor B
- 3. Which one of the following objects DOES NOT have gravitational potential energy? A A bottle on the surface of a table B. A ball on the level ground C A stone on the roof of a house D. A fruit on a branch of a tree 4. A loader lifts a 500 kg stone at a height of 8 m in 2 seconds. The power developed by the loader is (take g=10m/s^2 A. 5000 W B. 20000 W C. 40000 W D. 80 000 W
- Find the force in newtons needed to slow a 2500 kg truck from 20m/s to 10m/s in 100m. Hint:keep in mind the truck is slowing down.
- 14. When an object in the sky has reached its highest point overhead, we say it has reached its A. high point B. pinnacle C. maximum D. zenith
