1:   The speed of a body is doubled, the quantity which gets doubled is
Options:
  1. acceleration
  2. momentum
  3. KE
  4. weight

Answer: Option 2

Explanation:

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2:   1 KWH is equal to
Options:
  1. 3.6 X 10^6 J
  2. 3.6 X 10^4 J
  3. 3.6 X 10^3 J
  4. 3.6 X 10^-4 J

Answer: Option 1

Explanation:

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3:   If the momentum increases by 50% the percentage increase in KE is
Options:
  1. 75%
  2. 100%
  3. 125%
  4. 150%

Answer: Option 3

Explanation:

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4:   Masses m and 2m have same linear momentum. The ratio of their KE is
Options:
  1. 1:2
  2. 2:1
  3. 1:4
  4. 4:1

Answer: Option 2

Explanation:

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5:   The masses of two bodies are 1 kg and 4 kg and have same KE, the ratio of linear momentum is
Options:
  1. 1:2
  2. 4:1
  3. 1:4
  4. 2:1

Answer: Option 3

Explanation:

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6:   If a force F produces a velocity v in the body, then the power consumed is
Options:
  1. F/v
  2. v/F
  3. F.v
  4. Fv2

Answer: Option 3

Explanation:

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7:   1 HP is equal to ------- watt
Options:
  1. 74.6
  2. 746
  3. 7460
  4. 550

Answer: Option 2

Explanation:

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8:   A weight of 60 kg is pulled along horizontal 2m by a string. If u=0.5, inclination of string with horizontal is 60 degree, g=9.8 m/s2,. Work done is
Options:
  1. 294 J
  2. 15 J
  3. 588 J
  4. 197 J

Answer: Option 1

Explanation:

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9:   Spring constants of two springs are 1500 N/m and 3000 N/m. When stretched by equal forces, the ratio of PE will be
Options:
  1. 4:1
  2. 1:4
  3. 2:1
  4. 1:2

Answer: Option 3

Explanation:

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10:   The PE in spring is U when stretched by 2 cm. On stretching by 10 cm, the PE will be
Options:
  1. 1/U2
  2. 1/U
  3. 25 U
  4. none of these

Answer: Option 3

Explanation:

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