270242 The blockis placed on a frictionless surface in gravity free space. A heavy string of a mass \(m\) is connected and force \(F\) is applied on the string, then the tension at the middle of rope is

1

2 \(\frac{\square \frac{M}{2}+m \boxminus \cdot F}{m+M}\)

3 zero

4 \(\frac{M . F}{m+M}\)

270243 A ball is suspended by a thread from the ceiling of atram car. The brakes are applied and the speed of the car changes uniformly from 36 \(\mathbf{k m h}^{-1}\) to zero in \(5 \mathrm{~s}\). The angle by which the ball deviates from the vertical is \(\left(\mathrm{g}=\mathbf{1 0} \mathbf{~ m s}^{-2}\right)\)

270244 A block is kept on a frictionless inclined surface with angle of inclination\(\alpha\). The incline is given an acceleration ' \(a\) ' to keep the block stationary. Then ' \(a\) ' is equal to

270245 A man sits on a chair supported by a rope passing over a frictionless fixed pulley. The man who weighs\(1,000 \mathrm{~N}\) exerts a force of 450 \(\mathrm{N}\) on the chair downwards while pulling the rope on the other side. If the chair weighs \(250 \mathrm{~N}\), then the acceleration of the chair is

270242 The blockis placed on a frictionless surface in gravity free space. A heavy string of a mass \(m\) is connected and force \(F\) is applied on the string, then the tension at the middle of rope is

1

2 \(\frac{\square \frac{M}{2}+m \boxminus \cdot F}{m+M}\)

3 zero

4 \(\frac{M . F}{m+M}\)

270243 A ball is suspended by a thread from the ceiling of atram car. The brakes are applied and the speed of the car changes uniformly from 36 \(\mathbf{k m h}^{-1}\) to zero in \(5 \mathrm{~s}\). The angle by which the ball deviates from the vertical is \(\left(\mathrm{g}=\mathbf{1 0} \mathbf{~ m s}^{-2}\right)\)

270244 A block is kept on a frictionless inclined surface with angle of inclination\(\alpha\). The incline is given an acceleration ' \(a\) ' to keep the block stationary. Then ' \(a\) ' is equal to

270245 A man sits on a chair supported by a rope passing over a frictionless fixed pulley. The man who weighs\(1,000 \mathrm{~N}\) exerts a force of 450 \(\mathrm{N}\) on the chair downwards while pulling the rope on the other side. If the chair weighs \(250 \mathrm{~N}\), then the acceleration of the chair is

270242 The blockis placed on a frictionless surface in gravity free space. A heavy string of a mass \(m\) is connected and force \(F\) is applied on the string, then the tension at the middle of rope is

1

2 \(\frac{\square \frac{M}{2}+m \boxminus \cdot F}{m+M}\)

3 zero

4 \(\frac{M . F}{m+M}\)

270243 A ball is suspended by a thread from the ceiling of atram car. The brakes are applied and the speed of the car changes uniformly from 36 \(\mathbf{k m h}^{-1}\) to zero in \(5 \mathrm{~s}\). The angle by which the ball deviates from the vertical is \(\left(\mathrm{g}=\mathbf{1 0} \mathbf{~ m s}^{-2}\right)\)

270244 A block is kept on a frictionless inclined surface with angle of inclination\(\alpha\). The incline is given an acceleration ' \(a\) ' to keep the block stationary. Then ' \(a\) ' is equal to

270245 A man sits on a chair supported by a rope passing over a frictionless fixed pulley. The man who weighs\(1,000 \mathrm{~N}\) exerts a force of 450 \(\mathrm{N}\) on the chair downwards while pulling the rope on the other side. If the chair weighs \(250 \mathrm{~N}\), then the acceleration of the chair is

270242 The blockis placed on a frictionless surface in gravity free space. A heavy string of a mass \(m\) is connected and force \(F\) is applied on the string, then the tension at the middle of rope is

1

2 \(\frac{\square \frac{M}{2}+m \boxminus \cdot F}{m+M}\)

3 zero

4 \(\frac{M . F}{m+M}\)

270243 A ball is suspended by a thread from the ceiling of atram car. The brakes are applied and the speed of the car changes uniformly from 36 \(\mathbf{k m h}^{-1}\) to zero in \(5 \mathrm{~s}\). The angle by which the ball deviates from the vertical is \(\left(\mathrm{g}=\mathbf{1 0} \mathbf{~ m s}^{-2}\right)\)

270244 A block is kept on a frictionless inclined surface with angle of inclination\(\alpha\). The incline is given an acceleration ' \(a\) ' to keep the block stationary. Then ' \(a\) ' is equal to

270245 A man sits on a chair supported by a rope passing over a frictionless fixed pulley. The man who weighs\(1,000 \mathrm{~N}\) exerts a force of 450 \(\mathrm{N}\) on the chair downwards while pulling the rope on the other side. If the chair weighs \(250 \mathrm{~N}\), then the acceleration of the chair is