# physics-energy

Popular questions
1. ## physics-energy

A toy gun uses a spring to project a 5.3 g soft rubber sphere vertically. The spring constant is 8.0 N/m, the barrel of the gun is 15 cm long, and a constant frictional force of 0.032 N exists between barrel and projectile. How high does the projectile go

asked by nate on February 19, 2010
2. ## physics-energy

HI well i have two questions 1) a 2.0-m-long pendulum is released from rest when the support string is at an angle of 25 with the vertical. what is the speed of the bob at the bottom of the swing? 2)A 2.0*10^3-kg car starts from rest at the top of a

asked by becky on November 27, 2006
3. ## Physics-energy

Calculate the thermal energy dissipated from brakes in a 1310-kg car that descends a 13.5° hill. The car begins braking when its speed is 88 km/h and slows down to a speed of 34 km/h in a distance of 0.52 km measured along the road.

asked by Anonymous on February 16, 2010
4. ## Physics-Energy

Loop Track Location 1 Location 2 Location 3 PE (J) 0.16 0.12 0.04 KE (J) 0.03 0.06 0.09 TME (J) 0.19 0.18 0.13 h (m) 0.4 0.3 0.1 v (m/s) 1.2 1.7 2.1 Roller Track Location 1 Location 2 Location 3 PE (J) 0.12 0.08 0.04 KE (J) 0.03 0.06 0.07 TME (J) 0.15 0.14

asked by Anonymous on February 15, 2017