Hi, I have to submit this afternoon please help me. Clearly Circle your answer.

Question

Hi,

I have to submit this afternoon please help me.

Clearly Circle your answer. One answer only for credit! If an electron and a proton have the same initial position at the same initial time, and the same final position at the same final time, then which velocity would always be the same for both? initial velocity final velocity average velocity instantaneous velocity A ball is thrown with velocity of lOm/s upwards. If the ball is caught 1 m above its initial position, what is the speed of the ball when it is caught? An airplane moves at 120 m/sec to the west with respect to the air. The air moves at 50 m/sec to the south with respect to the ground. How fast does the airplane move with respect to the ground? A skier leaves a ski jump with a horizontal velocity (and no vertical velocity component). If the magnitude of the vertical component of her velocity the instant before she lands is 25 m/s. how much time elapses between leaving the jump and landing? Two objects are not in contact, but they affect each other via gravity, and there are no other forces acting on either object. Which statement is always true? The magnitude of the force of gravity is the same on both objects. The direction of the force of gravity is the same on both objects. The magnitude of the acceleration is the same for both objects. The direction of the acceleration is the same for both objects. Partial Credit Problem: Show all work. Points will not be given for a numerical answer only. If I cannot follow your work you will not receive full credit. Therefore clearly mark your steps with a numbering system and label each step. At what angle measured with the horizon must a projectile be launched such that its range is equal to its maximum height? Ignore air resistance. A speeding motorist zooms through a 50 km/h zone without noticing a stationary police car. The police officer immediately heads after the speeder, accelerating at 2.5 m/s2 (i.e. the speeder and the cop start at the same starting point). The officer catches up to the speeder 350 m down the road (i.e. the speeder and the cop arrive at the same point 350 m from where the speeder first passes the cop).Assuming that the speeder is going at a constant speed. Was the speeder breaking the speed limit? Draw the displacement, velocity and acceleration plots (clearly mark the speeder and police officer) Draw free-body diagrams for each block. Write Newton's Second Law for each block. Find the acceleration of each block.

Explanation / Answer

1)c

2) v^2 - 100 = (-2*9.8*1)

V = 8.966 m/s

3)Vp-Va =-120i

Vp= -50j

Va = 120i -50 j

magnitude= 130 m/s option= C

4)Vy= 25

Uy=0

so

a=9.8

25-0 = 9.8*t

t= 2.5 sec option=e

5)A

6)R = 2*usintheta *u costheta /g

hmax= u*u*sintheta*sintheta/(2*g)

R=hmax

then

tantheta=4g

theta= 88.5 degress

7)50 kmph = 13.89 m/s

a= 2.5 m/s^2

d=350

350 = 0.5*2.5*t*t

t=16.733

V = 350/t= 20.9 m/s > 13.89 m/s

yes he is breaking the rule

8) for body A

T =Fapp

T- Tab = (MA )*a

Tab = (MB)*a

a= T/(MA+MB)

for body A

Tab left and T =Fapp right

for body B

Tab right side

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