Everything Science Grade 10

CHAPTER 25. EXERCISE SOLUTIONS 25.20

Vectors ESAJK

End of chapter exercises ESAJL

(1)B

(2)D

(3)A

(4)A

Motion in one

dimension

ESAJM

End of chapter exercises ESAJN

(1) (a)displacement

(b)vector

(c)acceleration

(d)reference point

(e)velocity

(f)instantaneous ve-

locity

(2) (a)displacement

(b)acceleration

(c)velocity

(d)velocity

(3) (a)false

(b)true

(c)true

(d)false

(4)B

(5)D

(6)A

(7)C

(8) (a) 30 m·s−^1

(b) 7 , 5 m·s−^2

(c) 8 s

(d) 300 m

(9)D

(10)A

(11) (a)− 1 , 75 m·s−^2

(b) 4 , 8 s

(12) (a) 72 s

(b) 27 , 8 m·s−^1

(c) 100 km·h−^1

(13) (a) 0 , 6 m·s−^11 , 5 m

− 0 , 4 m·s−^2

(b) 11 , 5 s

(14) (a) 1 , 11 m·s−^1

(b) 1 , 8 s

(c) 16 , 67 m·s−^1

(d) 30 m

(e) determines safe

distance

(f)no

(g) 60 m

(15) (a) 35 s

(b) 15 , 71 m·s−^1

Chemistry: Chemical systems 493