Bumper cars A and B undergo a collision during which the momentum of the combined system is conserved.

Which equation(s) correctly states the principle of conservation of momentum?

1. P⃗ A, i+P⃗ B, i=P⃗ A, f+P⃗ B, f

2. P⃗ A, i+P⃗ A, f=P⃗ B, i+P⃗ B, f
3. ΔP⃗ A=ΔP⃗ B
4. ΔP⃗ A+ΔP⃗ B=0

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

Aball is thrown vertically upwards from the top of a tower with a speed of 100m/s. it strikes the pound near the base of the tower after 25sec . the height of the tower is

1,990,000,000,000,000,000,000,000,0 00,000 in scientific notation