1. Two cars initially separated by 500 m are moving toward each other with speeds (with respect to the ground) of 15 m/s and 10 m/s. The time (in seconds) they take them to reach each other is: a) 5 b) 10 c) 12 d) 15 e) 20
1. Two cars initially separated by 500 m are moving toward each other with speeds (with respect to the ground) of 15 m/s and 10 m/s. The time (in seconds) they take them to reach each other is: a) 5 b) 10 c) 12 d) 15 e) 20
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Transcribed Image Text:1.
Two cars initially separated by 500 m are moving toward each other with speeds (with respect to
the ground) of 15 m/s and 10 m/s. The time (in seconds) they take them to reach each other is:
a) 5
b) 10
c) 12
d) 15
e) 20
2. If A = 2i + 3k and B has magnitude 10 and makes an angle of 200 with the positive
x-axis counterclockwise, then the x-component of B - A is:
a)-11.4
b) -5.4
c)-1.4
d) -7.4
3.
e) -3
If A = 6i +3j and B=4i + 7j, then the angle (in degrees) enclosed between the two vectors is:
a) 120.4
b) 107.5
c) Zero
d) 100
e) 93.2
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