A ball of mass 0.25kg strikes a wall at a speed of 16ms-1 andrebounds with a speed of 10ms-1. If the angle between thevelocities of the ball before and after impact is a, where tan a =3/4, find the magitude of the impulse exerted by the wall on theball.

*A vector diagram would be awesome for visualization=D . Anywaythanks in advance!

answers

watching

views

For unlimited access to Homework Help, a Homework+ subscription is required.

Related questions

hi,

i have 5 questions i need the
complete solutions with their final results. is there anyonecouldhelp
me, i would appreciate that.

1)
A 0.12-kg ball is moving at 6 m/s when it is hit by a bat,causingit to reverse direction and have a speed of 14 m/s. What isthechange in the magnitude of the momentum of the ball?

2)

Alex throws a 0.15-kg rubber ball down onto the floor. Theball'sspeed just before impact is 6.5 m/s, and just after is 3.5m/s. Ifthe ball is in contact with the floor for 0.025 s, what isthemagnitude of the average force applied by the floor ontheball?

3)

Lonnie pitches a baseball of mass 0.20 kg. The ball arrives athomeplate with a speed of 40 m/s and is batted straight back toLonniewith a return speed of 60 m/s. If the bat is in contact withtheball for 0.050 s, what is the impulse experienced by theball?

4)

A ball with original momentum +4.0 kg?m/s hits a wall andbouncesstraight back without losing any kinetic energy. The changeinmomentum of the ball is:

5)

A machine gun is attached to a railroad flatcar that rollswithnegligible friction. If the railroad car has a mass of 6.25 ?104kg, how many bullets of mass 25 g would have to be fired at 250m/soff the back to give the railroad car a forward velocity of0.5m/s?

thank you in advance

1). A 300 g steel ball hangs on a 0.8 m long string. The ballispulled sideway so that the string is at 75 degree angle ,thenreleased. At the very bottom of its swing the ball strikes a1.2 kgsteel block that is resting on a frictionless table. Assumingthecollision to be perfectly elastic, determine its speed of theball

a). just before the collision and

b). just after the collision ( Hint : no derivation isneededhere.).

c). To what angle does the ball rebound ?

d). What quantities are conserved in the collision ?

e). In the real world, the above collision would result insomeenergy loss. Where does the energy go ? ( Give two forms ofenergyin which the lost energy can appear.)

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.

Weekly leaderboard

Home

Homework Help 3,900,000

Physics 110,000

Related textbook solutions

Physics: Principles with Applications

Related questions

Weekly leaderboard