SPEED AND VELOCITY
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MOTION IN A STRIGHT LINE

269794 A motorist drives north for 35.0 minutes at\(85.0 \mathrm{~km} / \mathrm{h}\) and then stops for 15.0 minutes. He next continues north, travelling \(130 \mathrm{~km}\) in 2.00 hours. What is his total displacement

1 \(85 \mathrm{~km}\)
2 \(179.6 \mathrm{~km}\)
3 \(20 \mathrm{~km}\)
4 \(140 \mathrm{~km}\)
MOTION IN A STRIGHT LINE

269795 The coordinates of a moving particle at any time' '\(t\) ' aregiven by \(x=\alpha t^{3}\) and \(y=\beta t^{3}\). The speed of theparticleat time ' \(t\) ' is given by

1 \(\sqrt{\alpha^{2}+\beta^{2}}\)
2 \(3 t \sqrt{\alpha^{2}+\beta^{2}}\)
3 \(3 t^{2} \sqrt{\alpha^{2}+\beta^{2}}\)
4 \(t^{2} \sqrt{\alpha^{2}+\beta^{2}}\)
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MOTION IN A STRIGHT LINE

269794 A motorist drives north for 35.0 minutes at\(85.0 \mathrm{~km} / \mathrm{h}\) and then stops for 15.0 minutes. He next continues north, travelling \(130 \mathrm{~km}\) in 2.00 hours. What is his total displacement

1 \(85 \mathrm{~km}\)
2 \(179.6 \mathrm{~km}\)
3 \(20 \mathrm{~km}\)
4 \(140 \mathrm{~km}\)
MOTION IN A STRIGHT LINE

269795 The coordinates of a moving particle at any time' '\(t\) ' aregiven by \(x=\alpha t^{3}\) and \(y=\beta t^{3}\). The speed of theparticleat time ' \(t\) ' is given by

1 \(\sqrt{\alpha^{2}+\beta^{2}}\)
2 \(3 t \sqrt{\alpha^{2}+\beta^{2}}\)
3 \(3 t^{2} \sqrt{\alpha^{2}+\beta^{2}}\)
4 \(t^{2} \sqrt{\alpha^{2}+\beta^{2}}\)
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