# physics

posted by .

A cart starts from position 4 (which is 20m above ground) in the figure below with a velocity of 11 m/s to the left. Find the speed with which the cart reaches positions 1, 2, and 3. Neglect friction.
speed at position 1 m/s?
speed at position 2 m/s?
speed at position 3 m/s?

position 3 is 10m
position 2 is 15m
position 1 is 0m or ground level

Honestly i don't even know how to begin?

• physics -

V3^2 = Vo^2 + 2g*d.
V3^2 = (11)^2 + 19.6*(20-10) = 317.
V3 = 17.80 m/s=Velocity at position 3.

V2^2 = (11)^2 + 19.6*(20-15) = 219.
V2 = 14.8 m/s.

V1^2 = ^11)^2 + 19.6*(20-0) = 513.
V1 = 22.6 m/s.

• physics -

Thank you so much! :)

## Similar Questions

1. ### physics

Jennifer (mass 58.0 kg) is standing at the left end of a 13.0 m long 594.0 kg cart that has frictionless wheels and rolls on a frictionless track. Initially both Jennifer and the cart are at rest. Suddenly, Jennifer starts running …
2. ### physics

A cart starts from position one with a velocity of 17.0 m/s. Find the speed of the cart at positions 2 and 3 ignoring friction. will the cart reach position four?
3. ### physics

A cart loaded with bricks has a total mass of 18 kg and is pulled at constant speed by a rope. The rope is inclined at 30.4  above the horizontal and the cart moves 21.5 m on a horizontal floor. The coefficient of kinetic friction …
4. ### Gen. physics

A cart is driven by a large propeller or fan, which can accelerate or decelerate the cart. The cart starts out at the position x = 0 m, with an initial velocity of +6.4 m/s and a constant acceleration due to the fan. The direction …
5. ### physics

A cart is driven by a large propeller or fan, which can accelerate or decelerate the cart. The cart starts out at the position x = 0 m, with an initial velocity of + 3.3 m/s and a constant acceleration due to the fan. The direction …
6. ### PHYSICS

A roller coaster powered by a spring launcher follows a frictionless track as shown below. The roller coaster cart has a mass of 500 kg, and the spring launcher has a spring constant of 1500 N/m. a. If the cart starts at a height h1 …
7. ### Physics

A cart rolls down a hill, if the cart weighs 8.7kg and the cart starts at a height of 3.0m, what is the final velocity of the cart?
8. ### physics

You exert a force of a known magnitude F on a grocery cart of total mass m. The force you exert on the cart points at an angle θ below the horizontal. If the cart starts at rest, determine an expression for the speed of the cart …
9. ### Physics

A 3,0kg cart moving East with a speed of 1.0ms^-1 collides head-on with a 5.0 kg cart that is initially moving West with a speed of 2.0 m.s^-1. After the collision, then 3.0 kg cart is moving to the left with a speed of 1.0 m.s^-1. …
10. ### AP Physics 1

You exert a force of a known magnitude F on a grocery cart of total mass m. The force you exert on the cart points at an angle θ below the horizontal. If the cart starts at rest, determine an expression for the speed of the cart …

More Similar Questions