(a) Find the PE at A PE = m g h = ( 500 kg )( 9.8 m/s2 )( 30 m )

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Presentation transcript:

(a) Find the PE at A PE = m g h = ( 500 kg )( 9.8 m/s2 )( 30 m ) A B C (a) Find the PE at A PE = m g h = ( 500 kg )( 9.8 m/s2 )( 30 m ) PE = 147 000 J

(c) the Total Energy at A 500 kg 30 m 18 m A B C (b) the KE at A v = 0 KE = 0 (c) the Total Energy at A Total Energy = PE + KE = 147 000 J + 0 Total Energy = 147 000 J

(d) the PE at B h = 0 PE = 0 (e) the KE at B Total Energy = PE + KE 500 kg 30 m 18 m A B C (d) the PE at B h = 0 PE = 0 (e) the KE at B Total Energy = PE + KE 147 000 J = 0 + KE KE = 147 000 J

(f) the speed at B 2 KE 2 ( 147 000 J ) v = = m 500 kg v = 24.2 m/s A B C (f) the speed at B 2 KE 2 ( 147 000 J ) v = = m 500 kg v = 24.2 m/s

(g) the PE at C PE = m g h = ( 500 kg )( 9.8 m/s2 )( 18 m ) A B C (g) the PE at C PE = m g h = ( 500 kg )( 9.8 m/s2 )( 18 m ) PE = 88 200 J

(h) the KE at C Total Energy = PE + KE 147 000 J = 88 200 J + KE 500 kg 30 m 18 m A B C (h) the KE at C Total Energy = PE + KE 147 000 J = 88 200 J + KE - 88 200 J - 88 200 J KE = 58 800 J

(i) the speed at C 2 KE 2 ( 58 800 J ) v = = m 500 kg v = 15.3 m/s A B C (i) the speed at C 2 KE 2 ( 58 800 J ) v = = m 500 kg v = 15.3 m/s