143710 A block of mass \(2 \mathrm{~kg}\) moving on a horizontal surface with speed of \(4 \mathrm{~ms}^{-1}\) enters a rough surface ranging from \(x=0.5 \mathrm{~m}\) to \(x=1.5 \mathrm{~m}\). The retarding force in this range of rough surface is related to distance by \(F=k x\) where \(k=12 ~ N m^{-1}\). The speed of the block as it just crosses the rough surface will be:

143708 Which of the following curves does not represent motion in one dimension?

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4

143702 Assertion: The magnitude of velocity of two boats relative to river is same. Both boats start simultaneously from same point on one bank may reach opposite bank simultaneously moving along different paths.
Reason: For boats to cross the river in same time. The component of their velocity relative to river in direction normal of flow should be same.

143703 Assertion: The driver in a vehicle moving with a constant speed on a straight road is an inertial frame of reference.
Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.

143710 A block of mass \(2 \mathrm{~kg}\) moving on a horizontal surface with speed of \(4 \mathrm{~ms}^{-1}\) enters a rough surface ranging from \(x=0.5 \mathrm{~m}\) to \(x=1.5 \mathrm{~m}\). The retarding force in this range of rough surface is related to distance by \(F=k x\) where \(k=12 ~ N m^{-1}\). The speed of the block as it just crosses the rough surface will be:

143708 Which of the following curves does not represent motion in one dimension?

1

2

3

4

143702 Assertion: The magnitude of velocity of two boats relative to river is same. Both boats start simultaneously from same point on one bank may reach opposite bank simultaneously moving along different paths.
Reason: For boats to cross the river in same time. The component of their velocity relative to river in direction normal of flow should be same.

143703 Assertion: The driver in a vehicle moving with a constant speed on a straight road is an inertial frame of reference.
Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.

143710 A block of mass \(2 \mathrm{~kg}\) moving on a horizontal surface with speed of \(4 \mathrm{~ms}^{-1}\) enters a rough surface ranging from \(x=0.5 \mathrm{~m}\) to \(x=1.5 \mathrm{~m}\). The retarding force in this range of rough surface is related to distance by \(F=k x\) where \(k=12 ~ N m^{-1}\). The speed of the block as it just crosses the rough surface will be:

143708 Which of the following curves does not represent motion in one dimension?

1

2

3

4

143702 Assertion: The magnitude of velocity of two boats relative to river is same. Both boats start simultaneously from same point on one bank may reach opposite bank simultaneously moving along different paths.
Reason: For boats to cross the river in same time. The component of their velocity relative to river in direction normal of flow should be same.

143703 Assertion: The driver in a vehicle moving with a constant speed on a straight road is an inertial frame of reference.
Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.

143710 A block of mass \(2 \mathrm{~kg}\) moving on a horizontal surface with speed of \(4 \mathrm{~ms}^{-1}\) enters a rough surface ranging from \(x=0.5 \mathrm{~m}\) to \(x=1.5 \mathrm{~m}\). The retarding force in this range of rough surface is related to distance by \(F=k x\) where \(k=12 ~ N m^{-1}\). The speed of the block as it just crosses the rough surface will be:

143708 Which of the following curves does not represent motion in one dimension?

1

2

3

4

143702 Assertion: The magnitude of velocity of two boats relative to river is same. Both boats start simultaneously from same point on one bank may reach opposite bank simultaneously moving along different paths.
Reason: For boats to cross the river in same time. The component of their velocity relative to river in direction normal of flow should be same.

143703 Assertion: The driver in a vehicle moving with a constant speed on a straight road is an inertial frame of reference.
Reason: A reference frame in which Newton's laws of motion are applicable is non-inertial.