Physics-
General
Easy
Question
Select the correct alternative(s).
- A cart moving on a horizontal plane with a constant acceleration g has a mass m attached from its top with a string. Then the constant angle formed by the string with the vertical is 45°.
- In the above case instead of string if their is spring, then also the constant angle remains the same.
- When the same cart moves over a smooth incline of angle 45° with constant speed then the constant angle formed by the string with the line perpendicular to the roof of the cart is 45°.
- When the same cart is coming down a smooth incline, constant angle formed by the string with the line perpendicular to the roof is 0°
The correct answer is: In the above case instead of string if their is spring, then also the constant angle remains the same.
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For the two blocks initially at rest under constant ext. forces of mass1 kg and 2kg shown, 
Which of the following is correct?
For the two blocks initially at rest under constant ext. forces of mass1 kg and 2kg shown, Which of the following is correct?
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Two blocks are arranged as shown in the figure. The relation between acceleration a1 and a2 is :
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with 
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = 10 m/s2 )
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = 10 m/s2 )
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = 10 m/s2 )
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In figure shown on the right, the mass of the trolley is 100 kg, and it can move without friction on the horizontal floor. Its length is 12m. The mass of the girl is 50 kg. Friction exists between the shoes of the girl and the trolley’s upper surface, with = 1/3. The girl can run with a maximum speed = 9 m/s on the surface of the trolley, with respect to the surface. At t = 0 the girl starts running from rest to the right. The trolley was initially stationary.(g = 10 m/s2 )
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I An initially stationary wooden block with a mass of 2 kg is pulled horizontally along a table with a time dependent force The coefficients of static and kinetic friction between the block and the table are 0.5 and 0.25 respectively. F(t) as a function of time is shown. Taking : g = 10 m/s2
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An initially stationary wooden block with a mass of 2 kg is pulled horizontally along a table with a time dependent force The coefficients of static and kinetic friction between the block and the table are 0.5 and 0.25 respectively. F(t) as a function of time is shown. Taking : g = 10 m/s2
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An initially stationary wooden block with a mass of 2 kg is pulled horizontally along a table with a time dependent force The coefficients of static and kinetic friction between the block and the table are 0.5 and 0.25 respectively. F(t) as a function of time is shown. Taking : g = 10 m/s2
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