Uniform Circular Motion Lowersixth Science Physics

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Quiz on circular motion concepts for Cameroonian students.

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YAKILI LMS

Cameroon

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Uniform Circular Motion Lowersixth Science Physics


Froggy Jumps Uniform Circular Motion Lowersixth Science PhysicsOnline version Quiz on circular motion concepts for Cameroonian students. by YAKILI LMS 1 What is circular motion? a Motion only in a vacuum b Motion of an object along a curved path around a fixed point c Motion in straight line at constant speed 2 What is the radius in circular motion? a Centre of mass of the system b Fixed distance from the centre to the moving object c Variable speed value 3 Centripetal acceleration points in which direction? a Away from the centre b Toward the centre of the circle c Perpendicular to velocity and radius 4 Centripetal acceleration formula? a v / r^2 b v^2 / r c r / v 5 Units of centripetal acceleration? a m/s b m/s^2 c m^2/s^2 6 What is centripetal force? a Torque about the centre b Force away from centre c Net force toward the circle’s centre causing circular motion 7 Centripetal force formula? a F = m a b F = m v r c F = m v^2 / r 8 Angular velocity definition? a Speed along the path b Distance over time c Rate of change of angle with time 9 Angular velocity symbol? a ω b r c v 10 Unit of angular velocity? a Meters per second (m/s) b Degrees per second (°/s) c Radians per second (rad/s) 11 Angular velocity formula? a ω = v / r b ω = r / t c ω = Δθ / Δt 12 Relationship v and ω? a v = ω r b v = ω / r c v = r / ω 13 Definition of period T? a Time to stop motion b Time for one complete revolution c Distance around circle 14 Relationship between ω and T? a ω = T / 2π b ω = π T c ω = 2π / T 15 Centripetal acceleration increases with? a Radius independent b Decreasing speed only c Speed and radius decrease 16 What happens if radius decreases while speed is constant? a Motion stops b Centripetal acceleration decreases c Centripetal acceleration increases 17 What keeps an object in circular motion on a track? a Friction away from centre b Inertia outward c Centripetal force toward the centre 18 If speed doubles and radius doubles, centripetal acceleration? a Doubles b Remains the same c Halves 19 Which quantity is constant for uniform circular motion? a Acceleration outward b Velocity c Speed 20 In circular motion, velocity is always? a Radial toward center b Vertical to radius c Tangent to the path 21 Radial (centripetal) acceleration is due to what? a Change in direction of velocity b Change in mass c Change in speed only 22 What does F = m v^2 / r describe? a Centripetal force b Gravitational force c Friction force 23 If r doubles with same speed, centripetal acceleration? a Increases by 2 b Decreases by a factor of 4 c Stays the same 24 Which quantity is not constant in non-uniform circular motion? a Radius b Central force c Speed 25 Which direction does centripetal force have? a Away from the centre b Towards the centre of the circle c Perpendicular to velocity only 26 What is angular velocity measured in? a m/s b kg/s c rad/s 27 What is the purpose of centripetal acceleration? a Change direction of motion b Increase speed c Decrease mass 28 Which is true for uniform circular motion? a Velocity is constant b Speed is constant c Centripetal force is zero 29 Centripetal force required if mass doubles with same v and r? a Remains same b Halves c Doubles 30 If angular velocity ω doubles, what happens to linear speed v (v=ωr) with constant r? a Doubles b Remains same c Halves 31 What is the key difference between centrifugal and centripetal forces? a Centripetal is outward b Centripetal is real inward; centrifugal is fictitious outward c Both are real inward forces 32 Which quantity must remain constant for a planet in a circular orbit around the sun? a Radius of orbit (approx) and angular motion b Mass of planet c Gravitational constant 33 Which variable combines v and r to give ω? a ω = v r b ω = v / r c ω = r / v 34 When does centripetal acceleration vanish? a If mass is zero b Only if v = 0 or r → ∞ c If angular velocity is zero 35 Which statement is true for motion in a vertical circle with constant speed? a Radius changes b Speed changes c Speed constant, direction changes 36 What is the SI unit for angular velocity? a kg·m/s b m/s^2 c rad/s 37 Which factor does not affect centripetal acceleration? a Speed b Mass of the object c Radius 38 What is the direction of velocity in circular motion? a Tangent to the circle b Vertical to radius c Radial inward 39 What does v^2 / r increase with? a Decreasing speed only b Increasing speed or decreasing radius c Increasing radius only 40 What is the typical symbol for radius in circular motion equations? a r b ρ c λ 41 If a car negotiates a curve, what provides the centripetal force? a Air resistance b Engine torque c Friction between tires and road 42 What is the relationship between ω and T besides ω = 2π/T? a T = ω r b T = 2π/ω c T = ω/2π 43 Which quantity changes if the speed changes but radius stays same? a Centripetal acceleration b Centripetal force c Radius 44 Centripetal acceleration is always directed toward the center. a Depends on mass b False c True 45 Which represents angular velocity in radians per second? a a b ω c v 46 Which best describes circular motion? a Motion in a straight line with constant speed b Motion of an object along a circular path with inward (centripetal) acceleration c Rotation with no change in velocity direction 47 What is angular velocity? a Speed along the circle's circumference b Rate of change of angular displacement, ω (rad/s) c Time derivative of linear speed 48 Centripetal acceleration is given by? a a_c = ω r^2 b a_c = v r c a_c = v^2 / r 49 What is centripetal force? a The net inward force toward the circle’s center causing circular motion b A fictitious force pointing outward c A force causing outward acceleration only 50 Units of angular velocity? a Radians per second (rad/s) b Seconds per radian (s/rad) c Meters per second (m/s)

Uniform Circular Motion Lowersixth Science Physics

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Uniform Circular Motion Lowersixth Science PhysicsOnline version

by YAKILI LMS

What is circular motion?

What is the radius in circular motion?

Centripetal acceleration points in which direction?

Centripetal acceleration formula?

Units of centripetal acceleration?

What is centripetal force?

Centripetal force formula?

Angular velocity definition?

Angular velocity symbol?

Unit of angular velocity?

Angular velocity formula?

Relationship v and ω?

Definition of period T?

Relationship between ω and T?

Centripetal acceleration increases with?

What happens if radius decreases while speed is constant?

What keeps an object in circular motion on a track?

If speed doubles and radius doubles, centripetal acceleration?

Which quantity is constant for uniform circular motion?

In circular motion, velocity is always?

Radial (centripetal) acceleration is due to what?

What does F = m v^2 / r describe?

If r doubles with same speed, centripetal acceleration?

Which quantity is not constant in non-uniform circular motion?

Which direction does centripetal force have?

What is angular velocity measured in?

What is the purpose of centripetal acceleration?

Which is true for uniform circular motion?

Centripetal force required if mass doubles with same v and r?

If angular velocity ω doubles, what happens to linear speed v (v=ωr) with constant r?

What is the key difference between centrifugal and centripetal forces?

Which quantity must remain constant for a planet in a circular orbit around the sun?

Which variable combines v and r to give ω?

When does centripetal acceleration vanish?

Which statement is true for motion in a vertical circle with constant speed?

What is the SI unit for angular velocity?

Which factor does not affect centripetal acceleration?

What is the direction of velocity in circular motion?

What does v^2 / r increase with?

What is the typical symbol for radius in circular motion equations?

If a car negotiates a curve, what provides the centripetal force?

What is the relationship between ω and T besides ω = 2π/T?

Which quantity changes if the speed changes but radius stays same?

Centripetal acceleration is always directed toward the center.

Which represents angular velocity in radians per second?

Which best describes circular motion?

What is angular velocity?

Centripetal acceleration is given by?

What is centripetal force?

Units of angular velocity?