Question

In: Physics

1-A bullet moving horizontally with a speed of 600 m/s strikes a sandbag and continues for...

1-A bullet moving horizontally with a speed of 600 m/s strikes a sandbag and continues for a distance of 20 cm.

A-What is the average acceleration of the bullet?

B-How long does it take to come to rest?

2-A 45.0 kg skier, starting from rest, begins skiing straight down an incline on the mountain of 12.5. The coefficient of kinetic friction between skis and snow is 0.08.

A-Draw a free body diagram of the skier and the forces acting on the skier.

B-Calculate the Normal force acting on the skier

C-Calculate the force of kinetic friction acting on the skier

D-Calculate the acceleration of the skier

E-The skier travels a distance of 150 m down the mountain. What is her final speed after 150?

Solutions

Expert Solution

Initial velocity of bullet ,u =600m/s

final velocity ,v =0m/s

s= 20cm =0.2m

(A) Average acceleration of the bullet?

Use Formula ,

ANSWER:

------

(B)Time?

Use Formula

ANSWER:

======================

(A)

(B)Calculate the Normal force acting on the skier

Normal Force,

ANSWER:

=====================

Frictional Force =coefficient of kinetic friction * Normal Force

ANSWER:

======================

(D) Calculate the acceleration of the skier

Consider the skier

Net Force =Mass*acceleration

ANSWER:

===================

(E)The skier travels a distance of 150 m down the mountain. What is her final speed after 150m?

Initial velocity ,u =0m/s

Use Formula

ANSWER:

=================

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

A 8-g bullet moving horizontally with speed of 250 m/s strikes and remains in a 4.0-kg...

A 8-g bullet moving horizontally with speed of 250 m/s strikes and remains in a 4.0-kg block initially at rest on the edge of a table. The block, which is initially 80 cm above the floor, strikes the floor a horizontal distance from the base of table. What is the horizontal distance on the floor?

A 4.00 g bullet is moving horizontally with a velocity of +355 m/s as shown in...

A 4.00 g bullet is moving horizontally with a velocity of +355 m/s as shown in figure below. The bullet is approaching two blocks resting on a horizontal frictionless surface. The bullet passes completely through the first block (an inelastic collision) and embeds itself in the second one, as shown in part (b). Note that both blocks are moving after the collision with the bullet. The mass of the first block is 1150 g and its velocity is +0.550 m/s...

A 5.17-g bullet is moving horizontally with a velocity of +369 m/s, where the sign +...

A 5.17-g bullet is moving horizontally with a velocity of +369 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely through the first block (an inelastic collision) and embeds itself in the second one, as indicated in part b. Note that both blocks are moving after the collision with the...

A 4.80-g bullet is moving horizontally with a velocity of +357 m/s, where the sign +...

A 4.80-g bullet is moving horizontally with a velocity of +357 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely through the first block (an inelastic collision) and embeds itself in the second one, as indicated in part b. Note that both blocks are moving after the collision with the...

A 5.87-g bullet is moving horizontally with a velocity of +348 m/s, where the sign +...

A 5.87-g bullet is moving horizontally with a velocity of +348 m/s, where the sign + indicates that it is moving to the right (see part a of the drawing). The bullet is approaching two blocks resting on a horizontal frictionless surface. Air resistance is negligible. The bullet passes completely through the first block (an inelastic collision) and embeds itself in the second one, as indicated in part b. Note that both blocks are moving after the collision with the...

In Fig. 8.3, a bullet of mass 0.01 kg moving horizontally strikes a block of wood...

In Fig. 8.3, a bullet of mass 0.01 kg moving horizontally strikes a block of wood of mass 1.5 kg which is suspended as a pendulum. The bullet lodges in the wood, and together they swing upward a distance of 0.40 m. What was the velocity of the bullet just before it struck the wooden block? The length of the string is 2 meters.

A 0.0210 kg bullet moving horizontally at 500 m/s embeds itself into an initially stationary 0.500...

A 0.0210 kg bullet moving horizontally at 500 m/s embeds itself into an initially stationary 0.500 kg block. (a) What is their velocity just after the collision? _____ m/s (b) The bullet-embedded block slides 8.0 m on a horizontal surface with a 0.30 kinetic coefficient of friction. Now what is its velocity? _____ m/s (c) The bullet-embedded block now strikes and sticks to a stationary 2.00 kg block. How far does this combination travel before stopping? ____ m

A 5.00-kg bullet moving with an initial speed of Vi= 400 m/s is fired into and...

A 5.00-kg bullet moving with an initial speed of Vi= 400 m/s is fired into and passes through a 1.00-kg block as shown in the Figure. The block, initially at rest on a frictionless, horizontal surface, is connected to a spring with force constant 1000 N/m. The block moves d = 5.00 cm to the right after impact before being brought to rest by the spring. Find: The speed at which the bullet emerges from the block. The kinetic energy...

A 0.00410–kg bullet traveling horizontally with a speed of 1.00 ✕ 103 m/s enters a 21.0–kg...

A 0.00410–kg bullet traveling horizontally with a speed of 1.00 ✕ 103 m/s enters a 21.0–kg door, embedding itself 19.0 cm from the side opposite the hinges as in the figure below. The 1.00–m–wide door is free to swing on its hinges. (a) Before it hits the door, does the bullet have angular momentum relative to the door's axis of rotation? Yes or No Explain. (b) Is mechanical energy conserved in this collision? Answer without doing a calculation. Yes or...

A proton moving horizontally at a speed of 2.88x10^5 m/s enters a region of space between...

A proton moving horizontally at a speed of 2.88x10^5 m/s enters a region of space between two square metal plates of side length 8.77 mm. The proton's path is deflected an angle of 12º upward. Protons have a mass of 1.67x10^-27 kg. a) Determine the electric field between the plates. b)Determine the amount and sign of electric charge on each plate.

Subjects