Conservation of Momentum Worksheet

Conservation of Momentum Worksheet

Name _________Do your work on another page!!! Assume that the sum of any external forces acting on the system is zero. Note: The arrows are just supposed to show the direction of the cars movement. They do not represent the magnitude of the velocity.1) Find the final velocity of the car on the right hand side.Before the collision

After the collision

2) After the collision, the two cars stick together. Find the final velocity of the two cars.

Before the collision

After the collision

3) After the collision, the two cars stick together. Find the initial velocity of the car on the right hand side.

Before the collision

After the collision

4) Two carts are at rest with a spring in between them. The spring is released. Find the mass of the cart on the right hand side.

Before the spring is released

After the spring is released

5) A cart is moving at a constant speed when a frog falls straight down onto the cart and sticks. The frog had no horizontal velocity before landing in the cart. Before the frog falls onto the cart

After the frog falls onto the cart

mfrog = 0.5 kg

a) Find the velocity of the cart and frog.

b) The frog then decides to jump straight up to a branch. What is the speed of the cart after the frog jumps up?

1 kg

V = 2 m/s

V = -2 m/s

2 kg

V = -1 m/s

V = ?

1 kg

2 kg

1 kg

V = 2 m/s

V = 0

2 kg

1 kg

V = ?

1 kg

2 kg

V = 3 m/s

V = ?

1 kg

V = 2 m/s

1 kg

1 kg

2 kg

? kg

V = 0 m/s

V = 0.5 m/s

2 kg

? kg

V = -2 m/s

1 kg

V = 3 m/s

Frog

Frog

V = ?

1 kg

Frog