17 public questions tagged with this topic.
Angular acceleration (α) is caused by net external torque (τ = Iα), which drives rotational change. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Net external torque. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
α = τI = 126 = 2rad/s2. Δω = αt = 2×3 = 6rad/s. ω = ω0+Δω = 3+6 = 9rad/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 9 rad/s. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
τ = Iα. τ = 9Nm, I = 3kg m2. α = τI = 93 = 3rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 3 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
τ = Iα. τ = 15Nm, I = 3kg m2. α = τI = 153 = 5rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
Angular acceleration is zero when the net torque is zero (τ = Iα), as torque drives rotational change. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Net torque is zero. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
Torque: τ = Iα. τ = 8Nm, I = 1.6kg m2. α = τI = 81.6 = 5rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
τ = Iα. τ = 16Nm, I = 8kg m2. α = τI = 168 = 2rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 2 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
τ = Iα. τ = 20Nm, I = 4kg m2. α = τI = 204 = 5rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
A force applied at the axis (r = 0) produces no torque (τ = rFsinθ = 0), so it cannot cause rotation about that axis. As per NCERT, applying relevant law/formula with correct units and sign convention leads to It causes no rotation. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
τ = Iα. τ = 10Nm, I = 2kg m2. α = τI = 102 = 5rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 5 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
τ = Iα. τ = 18Nm, I = 9kg m2. α = τI = 189 = 2rad/s2. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 2.0 rad/s². This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
α = τI = 2010 = 2rad/s2. ω = ω0+αt = 0+2×4 = 8rad/s. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 8 rad/s. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.
Ref: NCERT Class 11 Physics, Thermal Properties and Gravitation.
