- A 900kg car, traveling 13m/s to the right collides with a 3000kg semi truck initially at rest. After the 0.7s collision, the semi truck ends up moving 5.3m/s right. vert Jvert =15,900kgm/s before collision: P_(car)=11,700kgm/s P_(truck)=0 kgm/s after collision: P_(car)=square kgm/s P_(truck)=15,900kgm/s What direction did the car move after the collision? square v How fast did the car move after the collision? square m/s
- 5. A solid rectangle has the following dimensions.60.0 cm long, 10.0 cm wide and 500 cm deep. What is the volume of that rectangle in both cm^3 and mL? If that rectangle had a mass of 26 .88 kg, what is the density of that substance? Also, what is the identity of this substance?
- 36. Why does sound travel faster through steel than through air? A. Air is more compressible than steel. B. Steel is denser than air. C. Steel is always colder than air. D. Only light waves can travel through air.
- is the difference between a solid and liquid causes a solid to becom liquid and causes a liquid to become 9 as
- A physics teacher throws a 7kg dodgeball 20m/s hitting a 60kg student who is initially at rest on a skateboard. After hitting the student, the dodgeball rebounds back left with a speed of 6m/s vert Jvert =square unit before collision: Pball=square unit vee P_(student)=square unit vee after collision: Pball=square unit vee P_(student)=square unit v How fast did the student move after the impact? square square v What was the magnitude of the average impact force if the impact lasted 0 .49s? square square
