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1 The velocity of a car in the unit of m/s initially moving along east is given by V(t)-5-t. Its acceleration at t=2s is given by A. 5m/s² B. 1m/² along east C. 1m/s² along west D. None 2 A ball does the cyclic evolution, and makes 3 complete cycles in one second. Its angular speed in rad/second is A. G B. B. 3T C. D. 1.5 3 A 5kg block is released from rest 80m above the ground. When it has fallen 60m, its kinetic energy is shown as A. 1000J B. 20001 C. 30001 D. 4000J

1 The velocity of a car in the unit of m/s initially moving along east is given by V(t)-5-t. Its acceleration at t=2s is given by A. 5m/s² B. 1m/² along east C. 1m/s² along west D. None 2 A ball does the cyclic evolution, and makes 3 complete cycles in one second. Its angular speed in rad/second is A. G B. B. 3T C. D. 1.5 3 A 5kg block is released from rest 80m above the ground. When it has fallen 60m, its kinetic energy is shown as A. 1000J B. 20001 C. 30001 D. 4000J

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1 The velocity of a car in the unit of m/s initially moving along east is given by V(t)-5-t. Its acceleration at t=2s is given by A. 5m/s2 B. 1m/² along east C. 1m/s² along west D. None 2 A ball does the cyclic evolution, and makes 3 complete cycles in one second. Its angular speed in rad/second is 3. C. D. 1.5 3 A 5kg block is released from rest 80m above the ground. When it has fallen 60m, its kinetic energy is shown as A. 1000J B. 20001 C. 30001 D. 4000J 5 If we know the temperature in Celsius degrees is t=30c, what about its temperature in Kelvins? A. 300c B. 303.15 c C. 273.15 C D. None of above. ARCA A. 6 B. B.
Transcribed Image Text:1 The velocity of a car in the unit of m/s initially moving along east is given by V(t)-5-t. Its acceleration at t=2s is given by A. 5m/s2 B. 1m/² along east C. 1m/s² along west D. None 2 A ball does the cyclic evolution, and makes 3 complete cycles in one second. Its angular speed in rad/second is 3. C. D. 1.5 3 A 5kg block is released from rest 80m above the ground. When it has fallen 60m, its kinetic energy is shown as A. 1000J B. 20001 C. 30001 D. 4000J 5 If we know the temperature in Celsius degrees is t=30c, what about its temperature in Kelvins? A. 300c B. 303.15 c C. 273.15 C D. None of above. ARCA A. 6 B. B.
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