1) Anita is running to the right at 5.0m/s , as shown in thefigure. Balls 1 and 2 thrown toward her at 10m/s by friendsstanding on the ground.(Figure 1)

According to Anita, what is the speed of the first ball?

According to Anita, what is the speed of the second ball?

2)In the Soapbox Derby in (Figure 1) , young participantsbuild non-motorized cars with very low-friction wheels. Cars raceby rolling down a hill. Assume that the track begins with a47-ft-long (1 m = 3.28 ft) section tilted 12? below horizontal.

What is the maximum possible acceleration of a car moving downthis stretch of track?

If a car starts from rest and undergoes this acceleration forthe full l, what is its final speed in m/s?

3) a) Find the x- and y-components of thevector d? = (2.0km , 29? left of+y-axis).

b)Find the x- and y-components of the vectorv? = (5.0cm/s , ?x-direction).

c)Find the x- and y-components of the vectora? = (17m/s2 , 45? left of?y-axis).

4)

Transcribed Image Text:

1 10 m/s 10 m/s 5 m/s 1 10 m/s 10 m/s 5 m/s

Answer rating: 100% (QA)

1a The relative speed of an object with respect to observer moving in same direction is v rs v v 0 Here v is the speed of the object and v 0 is the speed of the observer Substitute 10 ms for v and 5 m... View the full answer