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1) A 206kg projectile, fired with a speed of 148m/s at a 67.0 degree angle, breaks into three pieces of equal mass at the highest point of its arc (where its velocity is horizontal). Two of the fragments move with the same speed right after the explosion as the entire projectile had just before the explosion; one of these moves vertically downward and the other horizontally.

A) Determine the magnitude of the velocity of the third fragment immediately after the explosion. ANSWER IN M/S

B) Determine the direction of the velocity of the third fragment immediately after the explosion.

PLEASE ANSWER DEGREE ABOVE THE HORIZONTAL.

C) Determine the energy released in the explosion. ANSWER IN J.

1) A 0.160kg baseball pitched horizontally at 34.5m/s strikes a bat and is popped straight up to a height of 37.0m .

A) If the contact time between bat and ball is 2.5ms , calculate the magnitude of the average force between the ball and bat during contact. THE ANSWER IS 2800N.

B) Find the direction of the average force on the ball.

PLEASE HELP ME IN THIS.

2) Calculate the impulse experienced when a 64kg person lands on firm ground after jumping from a height of 2.8m . THE ANSWER IS 470KG*M/S

A) Estimate the average force exerted on the person's feet by the ground if the landing is with bent legs. When the legs are bent, assume the body moves about 40 during impact.

PLEASE HELP ME IN THIS PART

1) A ball of mass 0.255kg that is moving with a speed of 7.7m/s collides head-on and elastically with another ball initially at rest. Immediately after the collision, the incoming ball bounces backward with a speed of 3.7m/s .

A) Calculate the velocity of the target ball after the collision.

2) The jet engine of an airplane takes in 120 kg of air per second, which is burned with 4.6kg of fuel per second. The burned gases leave the plane at a speed of 600m/s (relative to the plane). If the plane is traveling 290m/s (650mi/hr ), determine the following quantities.

A) The thrust due to accelerated air passing through the engine.

1) A ball of mass 0.255kg that is moving with a speed of 7.7m/s collides head-on and elastically with another ball initially at rest. Immediately after the collision, the incoming ball bounces backward with a speed of 3.7m/s .

A) Calculate the velocity of the target ball after the collision.

B) Calculate the mass of the target ball.

2) The jet engine of an airplane takes in 120 kg of air per second, which is burned with 4.6kg of fuel per second. The burned gases leave the plane at a speed of 600m/s (relative to the plane). If the plane is traveling 290m/s (650mi/hr ), determine the following quantities.

A) The thrust due to accelerated air passing through the engine.

1) A 24g bullet strikes and becomes embedded in a 1.40kg block of wood placed on a horizontal surface just in front of the gun.

A) If the coefficient of kinetic friction between the block and the surface is 0.38, and the impact drives the block a distance of 9.5m before it comes to rest, what was the muzzle speed of the bullet?

2) A 142g baseball moving 28.0m/s strikes a stationary 5.20kg brick resting on small rollers so it moves without significant friction. After hitting the brick, the baseball bounces straight back, and the brick moves forward at 1.40m/s .

A) What is the baseball's speed after the collision?

B) Find the total kinetic energy before the collision.

C) Find the total kinetic energy after the collision.

PLEASE EXPLAIN

The small mass sliding without friction along the looped track shown in the figure, http://session.masteringphysics.com/problemAsset/1... (it's not a Roller coaster and my picture has the end being flat) is to remain on the track at all times, even at the very top of the loop of radius r.

a) In terms of the given quantities, determine the minimum release height h.

b) If the actual release height is 5h, calculate the normal force exerted by the track at the bottom of the loop.

c) If the actual release height is 3h, calculate the normal force exerted by the track at the top of the loop.

d) If the actual release height is 3h, calculate the normal force exerted by the track after the block exits the loop onto the flat section.

The answer for a) Please answer with units. The answer for b) wants it in terms of mg.

PLEASE EXPLAIN HOW YOU GOT IT!!

1) A 155g baseball is dropped from a tree 15.0m above the ground.

A) If it actually hits the ground with a speed of 7.00m/s , what is the magnitude of the average force of air resistance exerted on it?

B) What is the direction of the average force of air resistance exerted on baseball?

A) Upward B) Downward C) Horizontally ( PLEASE CHOOSE ONE ANSWER)

PLEASE EXPLAIN!

What is the dot product of A= 2.0x^2I – 4.0xj +5.0k and B = 11.0I +2.5xj?

Express your answer in terms of x.

Please Explain.

1) What is the dot product of the magnitude A = (2.0x^2)i - (4x)j + (5)k and the magnitude B = (11.0)i + (2.5x)j

1) An elevator cable breaks when a 950 kg elevator is 20.5 m above the top of a huge spring ( k= 6.00×10^4 N/m) at the bottom of the shaft.

A) Calculate the amount the spring compresses (note that here work is done by both the spring and gravity).

A certain white dwarf star was once an average star like our Sun. But now it is in the last stage of its evolution and is the size of our Moon but has the mass of our Sun. THE gravity on the surface on this star IS 4.38 * 10^7 m/s^2

A) What would be the speed of a baseball dropped from a height of 2.0 m when it hit the surface?

1) Calculate the effective value of g, the acceleration of gravity, at 6700m , above the Earth's surface.

2) Calculate the effective value of g , the acceleration of gravity, at 6900km , above the Earth's surface.

Between the orbits of Mars and Jupiter, several thousand small objects called asteroids move in nearly circular orbits around the Sun. Consider an asteroid that is spherically shaped with radius r and density 2600 kg/m^3 .

A) You find yourself on the surface of this asteroid and throw a baseball at a speed of 24 m/s . If the baseball is to travel around the asteroid in a circular orbit, what is the largest radius asteroid on which you are capable of accomplishing this feat?

B) After you throw the baseball, you turn around and face the opposite direction and catch the baseball. How much time T elapses between your throw and your catch?

A certain white dwarf star was once an average star like our Sun. But now it is in the last stage of its evolution and is the size of our Moon but has the mass of our Sun. THE gravity on the surface on this star IS 4.38 * 10^7 m/s^2

A) How much would a 60 kg person weigh on this star?

B) What would be the speed of a baseball dropped from a height of 2.0 m when it hit the surface?

1) Suppose the coefficient of kinetic friction between m A and the plane is μk= 0.11, and that m A = m B = 2.7kg .

Figure available at http://session.masteringphysics.com/problemAsset/1...

A) As m B moves down, determine the magnitude of the acceleration of m A and m B, given theta = 32 degrees.

I AM LOST. PLEASE HELP!!

1) An airplane traveling at 515 km/hr needs to reverse its course. The pilot decides to accomplish this by banking the wings at an angle of 40 degrees.

A) Find the time needed to reverse course.[Hint: Assume an aerodynamic "lift" force that acts perpendicularly to the flat wings].

1) The terminal velocity of a 4×10^−5 kg raindrop is about 5 m/s . Assuming a drag force Fd= -bv.

A) Assuming a drag force determine the value of the constant b.

B) Assuming a drag force determine the time required for such a drop, starting from rest, to reach 63% of terminal velocity.

PLEASE EXPLAIN. 10 POINTS!!

A bicyclist can coast down a 7.0 degrees hill at a steady 9.5 km/hr .The mass of the cyclist plus bicycle is 85.0 kg . If the drag force is proportional to the square of the speed v , so that Fd= - cv^2 .

A) Calculate the value of the constant c.

B) Calculate the average force that must be applied in order to descend the hill at 27 km/hr . Ignore other types of friction.

1) The terminal velocity of a 4×10^−5 kg raindrop is about 5 m/s . Assuming a drag force Fd= -bv.

A) Assuming a drag force determine the value of the constant b.

B) Assuming a drag force determine the time required for such a drop, starting from rest, to reach 63% of terminal velocity.

A fire hose held near the ground shoots water at a speed of 6.5m/s.

At what angle(s) should the nozzle point in order that the water land 2.5 away?

1. Sketch the trajectory for the 18 degree angle.

2. Sketch the trajectory for the 72 degree angle.

Please tell me the exact points for each graph like how many points ( high, low, middle) and where will they be on the graph. PLEASE HELP ME ON 2 GRAPH QUESTIONS