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What is the use of light ?

The gravitational force exerted on a baseball is 2.31 N down. Apitcher throws the ball horizontally with velocity 14.5 m/s byuniformly accelerating it along a straight horizontal line for atime interval of 161 ms. The ball starts from rest.

(a) Through what distance does it move before its release?

(b) What are the magnitude and direction of the force the pitcherexerts on the ball?

The gravitational force exerted on a baseball is 2.21 N down. Apitcher throws the ball horizontally with velocity 18.0 m/s byuniformly accelerating it along a straight horizontal line for atime interval of 170 ms. The ball starts from rest. a).- Throughwhat distance does it move before its release? b).- what are themagnitude and direction of the force the pitcher exerts an theball?.
Can anyone help me with this problem please?
Thank You.

1. Please help me thank you

1). A rifle bullet with a mass of 12.0g traveling toward therightat 260 m/s strikes a large bag of sand and penetrates it toadeapth of 23.0 cm . Determine the magnitude and direction ofthefriction force that acts on the bullet.

Question 1 of 7 0.5 Points
A 6 N force acts on a 0.3-kg object for 0.3 seconds. By how muchdoes the object's momentum change (in kg-m/s)?

Question 2 of 7 0.5 Points
A 0.4-kg object is traveling to the right (in the positivedirection) with a speed of 1 m/s. After a 0.2 s collision, theobject is traveling to the left at 3 m/s. What is the magnitude ofthe impulse (in N-s) acting on the object? The answer must bepositive.

Question 3 of 7 1.0 Points
The force shown in the attached figure is the net eastward forceacting on a ball. The force starts rising at t = 0.020 s, fallsback to zero at t = 0.062 s, and reaches a maximum force of 55 N atthe peak. Determine with an error no bigger than 25% (high or low)the magnitude of the impulse (in N-s) delivered to the ball. Hint:Do not use J = F?t. Look at the figure. Find the area of a nearlyequally sized triangle.

Question 4 of 7 1.0 Points
A bat hits a moving baseball. If the bat delivers a net eastwardimpulse of 0.6 N-s and the ball starts with an initial horizontalvelocity of 3.8 m/s to the west and leaves with a 5.2m/s velocityto the east, what is the mass of the ball (in grams)?
Part 5 of 7 -

Question 5 of 7 0.5 Points
The force sensor measures the force on the sensor due to thebumper, but the cart's momentum change arises from the force on thecart due to the bumper. Which of the following facts are needed toassert that the magnitude of these two forces are nearly equal atall times.
1. Their magnitudes differ by the magnitude of the net force on thebumper.
2. The force of friction is small.
3. The net force on the bumper is small.
4. The cart's weight is canceled by the the normal force exerted bythe track.

A. 1, 3

B. 2, 4

C. 3, 4

D. 1, 2

E. 1, 4

F. 1, 2, 3, 4

G. 2, 3

Part 6 of 7 -

Question 6 of 7 1.0 Points
A cart traveling at 0.3 m/s collides with stationary object. Afterthe collision, the cart rebounds in the opposite direction. Thesame cart again traveling at 0.3 m/s collides with a differentstationary object. This time the cart is at rest after thecollision. In which collision is the impulse on the cartgreater?

A. The second collision.

B. Cannot be determined without knowing the mass of the cart.

C. The impulses are the same.

D. The first collision.

E. Cannot be determined without knowing the rebound speed of thefirst collision. Reset Selection

Part 7 of 7 -

Question 7 of 7 0.5 Points
The force vs. time graphs for two collisions are shown. Whichcollision has the largest impulse?


A. The impulse for collision 2 since it lasts longer.

B. Cannot be determined since the masses are unknown.

C. The impulse for collision 1 since it has the larger maximumforce.

D. Cannot be determined since the initial an final speeds areunknown.

E. The impulses are the same.

1) A hockey puck with a mass of .115kg moving at 45 m/s strikes adead octopus thrown onto the ice by a fan the octopus has a mass of.865 kg the puck hits the octopus and they slide off together whatis their velocity

2) A 10.0g bullet is fired from a gun with a speed of 600 m/s thegun has a mass of 5.00kg with what speed will the gun recoil?

3) a 1000kg car moving north at 40m/s collides with 3.0 x 10^3 kgtruck moving south at 10.0 m/s the two vehicles stick together andthe wreckage starts to move?

4) an astronaut wishes to play catch in space by bouncing a balloff the side on the space station. the ball has the same mass asthe astronaut and the bounce off the space station is perfectlyelastic what would happen?

5) a 0.25 kg soccer ball is rolling at 10.0 m/s towards a playerthe player kicks the ball in the opposite direction and gives theball a speed of 25 m/s what is the average force during the kick ifthe duration of the contact was 2.0 x 10^-2 s

6) a 54 N impulse is given to a 6.0 kg object the change inmomentum for the object is? ( in kg m/s)

Question 1 of 7 0.5 Points
A 6 N force acts on a 0.3-kg object for 0.3 seconds. By how muchdoes the object's momentum change (in kg-m/s)?

Question 2 of 7 0.5 Points
A 0.4-kg object is traveling to the right (in the positivedirection) with a speed of 1 m/s. After a 0.2 s collision, theobject is traveling to the left at 3 m/s. What is the magnitude ofthe impulse (in N-s) acting on the object? The answer must bepositive.

Question 3 of 7 1.0 Points
The force shown in the attached figure is the net eastward forceacting on a ball. The force starts rising at t = 0.020 s, fallsback to zero at t = 0.062 s, and reaches a maximum force of 55 N atthe peak. Determine with an error no bigger than 25% (high or low)the magnitude of the impulse (in N-s) delivered to the ball. Hint:Do not use J = F?t. Look at the figure. Find the area of a nearlyequally sized triangle.

Question 4 of 7 1.0 Points
A bat hits a moving baseball. If the bat delivers a net eastwardimpulse of 0.6 N-s and the ball starts with an initial horizontalvelocity of 3.8 m/s to the west and leaves with a 5.2m/s velocityto the east, what is the mass of the ball (in grams)?
Part 5 of 7 -

Question 5 of 7 0.5 Points
The force sensor measures the force on the sensor due to thebumper, but the cart's momentum change arises from the force on thecart due to the bumper. Which of the following facts are needed toassert that the magnitude of these two forces are nearly equal atall times.
1. Their magnitudes differ by the magnitude of the net force on thebumper.
2. The force of friction is small.
3. The net force on the bumper is small.
4. The cart's weight is canceled by the the normal force exerted bythe track.

A. 1, 3

B. 2, 4

C. 3, 4

D. 1, 2

E. 1, 4

F. 1, 2, 3, 4

G. 2, 3

Part 6 of 7 -

Question 6 of 7 1.0 Points
A cart traveling at 0.3 m/s collides with stationary object. Afterthe collision, the cart rebounds in the opposite direction. Thesame cart again traveling at 0.3 m/s collides with a differentstationary object. This time the cart is at rest after thecollision. In which collision is the impulse on the cartgreater?

A. The second collision.

B. Cannot be determined without knowing the mass of the cart.

C. The impulses are the same.

D. The first collision.

E. Cannot be determined without knowing the rebound speed of thefirst collision. Reset Selection

Part 7 of 7 -

Question 7 of 7 0.5 Points
The force vs. time graphs for two collisions are shown. Whichcollision has the largest impulse?


A. The impulse for collision 2 since it lasts longer.

B. Cannot be determined since the masses are unknown.

C. The impulse for collision 1 since it has the larger maximumforce.

D. Cannot be determined since the initial an final speeds areunknown.

E. The impulses are the same.

A train is initially traveling due north at 25m/sec. Afternegotiating a curve, the train ends up traveling east at 20m/sec.The train's mass is 500,000 N and took 5.0 s to negotiate the turn.(Use north as the Y direction and east as the X direction)

A) What is the initial momentum vector for the train expressed interms of unit vectors?

B) What is the final momentum vector for the train expressed interms of unit vectors?

C) what is the change in momentum for the train?

1. Two Train cars of identical mass (m = 10.0 kg) collide

and move off as shown. The left car was initially traveling at 2.0 m/s right and the right car was initially traveling at a velocity of 3.0 m/s left. After the collision, the left car is traveling at a velocity of 2.5 m/s to the left.

a. What type of a collision is depicted here?

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b. What was the initial momentum of the right car?

c. What was the initial momentum of the left car?

d. What was the final momentum of the left car?

e. What was the final momentum of the right car?

How much would a 95 kg-Darth Vader weigh on the planet Vaal, if its gravitational field strength is 11.5 N/kg?

a. 1.3 x 10² N

b. 95 kg

c. 1.1 x 10³ kg

d. 1.1 x 10² N

e. 1.1 x 10³ N