# physics

A 0.55 kg block of ice is sliding by you on a very slippery floor at 4 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.0025 seconds. The block eventually slides at an angle of 23 degrees from its original direction (labeled
θ
in the diagram). The overhead view shown in the diagram is approximately to scale. The arrow represents the average force your toe applies briefly to the block of ice.

I found the unit vector to be <0.9205,0,-0.3907>

What is the x-component of the block's momentum after the kick?

What is the magnitude of the block's momentum after the kick?

Use your answers to the preceding questions to find the z-component of the block's momentum after the kick (drawing a diagram is helpful):

What was the magnitude of the average force you applied to the block?

1. 👍
2. 👎
3. 👁
1. I suppose your original direction was x.

The x momentum will not change since there was no force in the x direction.

x momentum = .55 * 4 = 2.2 kg m/s

I assume z is the horizontal axis perpendicular to x.
tsn 23 = Vz/4
so
Vz = 1.7 m/s
z momentum = .55*1.7 = .934 kg m/s

magnitude of momentum
= sqrt(2.2^2+.934^2)
= 2.39 kg m/s

F * time = impulse = change of momentum
F = 2.39/.0025 = 956 Newtons

1. 👍
2. 👎
2. Tank u :3

1. 👍
2. 👎

## Similar Questions

1. ### physics

a dockworker applies a constant horizontal force of 80 N to a block of ice on a smooth horizontal floor. The friction force is negligible the block start from rest and move 11m in 5 sec what is it mass & if worker stop pushing at

2. ### Physic

A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle è = 40° with the horizontal. The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a)

3. ### physics

Hi, ive been trying to get this problem for a couple of days now but i have no idea of what to do. A very slippery block of ice slides down a smooth ramp tilted at angle pheta. a)The ice is released from rest at vertical height h

4. ### Physics

A block of mass m = 2.00 kg is released from rest h = 0.500 m from the surface of a table, at the top of a theta = 30.0° incline. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine the acceleration

1. ### Physics

A dockworker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 13.0 m in a time 4.50 s. What is the

2. ### physics

A 0.6 kg block of ice is sliding by you on a very slippery floor at 2.5 m/s. As it goes by, you give it a kick perpendicular to its path. Your foot is in contact with the ice block for 0.0035 seconds. The block eventually slides

3. ### physics

Two block are connected by a lightweight, flexible cord that passes over friction less pulley. If m1=3.6 kg amd m2= 9.2kg, and block 2 is initially at rest 140 cm. above the floor, how long does it take block 2 to reach the floor?

4. ### Physics

A dockworker applies a constant horizontal force of 79.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 13.0 m in a time 4.50 s. What is the

1. ### physics

a body of mass 25kg moving at 3m/s on a rough horizontal floor is brought to rest after sliding through a distance of 2.5m on the floor. calculate the coefficient of sliding friction.

2. ### Math & a bit of Physics

A block of mass 11 kg is at rest on a rough plane inclined at 30° to the horizontal. A force acts on the block in a direction up the plane parallel to a line of greatest slope. When the magnitude of the force is 2X N the block is

3. ### Calculus

A block of ice is exposed to heat in such a way that the block maintains a similar shape as it metls. The block of ice is initially 2' wide, 2 'high, and 3' long. If the change in the width of the ice is -1/3 ft/hr, find: the

4. ### physics

a 3.5 kg block is accelerated from rest by a compressed spring of spring constant 640 N/m. The block leaves the spring at the springs relaxation length.The block then travels over a horizontal floor with coefficient of kinetic