Collisions II Lowersixth Science Physics

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Momentum & inelastic collisions in 1D/2D

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Collisions II Lowersixth Science Physics


Froggy Jumps Collisions II Lowersixth Science PhysicsVersion en ligne Momentum & inelastic collisions in 1D/2D par YAKILI LMS 1 What is conserved in a closed system during a collision? a Linear momentum b Kinetic energy c Mass 2 In a perfectly inelastic collision, what happens to the objects? a Kinetic energy increases b They stick together c They bounce apart 3 Which quantity is always conserved in elastic and inelastic collisions? a Sound energy b Kinetic energy c Momentum 4 If two equal masses collide head-on in 1D and stick, their final velocity is: a Sum of velocities b Average velocity c Zero 5 In a 1D inelastic collision, kinetic energy: a Increases b Decreases c Remains constant 6 Two cars of equal mass collide elastically head-on. Their speeds after collision are: a Zero b Swapped c Same as before 7 What does the coefficient of restitution (e) measure? a Impulse b Mass c Elasticity of collision 8 In a 1D inelastic collision, what happens to kinetic energy? a Some is lost as heat/deformation b It stays the same c It doubles 9 Momentum before equals momentum after is a statement of: a Newton's third law b Conservation of energy c Conservation of momentum 10 In a two-dimensional collision, momentum must be conserved in: a Both x and y directions b Only x c Only y 11 Which factor affects the final velocity in a 2D collision? a Temperature b Color of objects c Masses and initial velocities 12 Explosions in mechanics involve: a External gravity only b No momentum change c Internal forces change system momentum 13 In a two-dimensional oblique collision, the impulse is: a Changing momentum along the collision normal b Changing angular momentum only c Zero 14 If a moving object collides with a stationary one elastically in 1D, the total momentum: a Increases b Decreases c Is unchanged 15 When two unequal masses collide inelasticy in 1D and stick, the final velocity is: a Greater than both initial velocities b Between the initial velocities weighted by masses c Zero 16 Which equation expresses conservation of momentum in 1D? a m1v1 + m2v2 = 0 b m1u1 = m2v2 c m1u1 + m2u2 = m1v1 + m2v2 17 In a perfectly inelastic collision, objects: a Bounce back separately b Move together after impact c Stop completely 18 What is the effect of a perfectly elastic collision on kinetic energy? a Kinetic energy decreases b Kinetic energy increases c Kinetic energy is conserved 19 A 2D collision occurs in a plane. Conservation applies to: a Only speed magnitude b Only along y c Vector components along x and y 20 In an oblique collision between two bodies, impulse acts: a Perpendicular to motion b Random direction c Along the line of impact 21 Explosions are modeled as: a Internal forces causing separation with momentum conserved b External push only c No momentum change 22 If a skillfully designed collision is perfectly elastic, the total kinetic energy before equals: a Greater after b Less after c Total kinetic energy after 23 In a 1D inelastic collision, the momentum is: a Conserved b Not conserved c Increased 24 A car crash: the energy lost appears as: a Deformation and heat b Kinetic energy gain c Sound only 25 What does e=0 indicate in a collision? a No collision b Perfectly inelastic c Perfectly elastic 26 What does e=1 indicate? a Perfectly elastic b Perfectly inelastic c No collision 27 In a two-body oblique collision, momentum components in which directions are considered? a Along and perpendicular to the line of impact b Along velocity only c Perpendicular to motion only 28 Which quantity remains constant in a closed system during collision? a Total mass b Total energy c Total momentum 29 A stationary mass is hit by a moving mass head-on elastically. Final speeds depend on: a Masses and initial speed b Room temperature c Color of masses 30 In an inelastic collision, the final velocity is determined by: a Conservation of energy alone b External work c Conservation of momentum 31 During a collision, impulse equals: a Change in velocity only b External force c Change in momentum 32 Which scenario best describes a 2D collision? a Two bodies collide at an angle b A straight-on head-on only c No collision 33 What is conserved in explosions within a system? a Total momentum b Total energy c Kinetic energy 34 If two objects of unequal mass collide in 1D elastically, the lighter one: a Often speeds up more after collision b Stops c Remains unchanged 35 Which factor does not affect momentum conservation? a Velocity b Mass c External force during collision 36 Work done during collision affects: a Momentum conservation b Kinetic energy change c Mass 37 Two-dimensional momentum conservation is applied to: a Only vertical b Both horizontal and vertical components c Only horizontal 38 A completely inelastic collision results in: a Maximum kinetic energy gained b Maximum kinetic energy lost c No energy loss 39 In a collision, momentum before equals momentum after for: a Only the lighter object b Each object individually c The system as a whole 40 The line of impact is perpendicular to: a The surface b The impulse direction c The velocity 41 Which statement is true for all collisions in a closed system? a Kinetic energy increases b Total momentum is constant c Total energy changes 42 After a perfectly elastic 1D collision, the objects: a Stop completely b Exchange velocities if masses equal c Merge together 43 Two masses collide at an angle. Their momentum vectors: a Add vectorially to equal initial total b Subtract to zero c Set to perpendicular 44 Which condition ensures momentum conservation in 2D? a Massless bodies b External impulses present c No external impulses 45 Explosions in space: momentum of the system is: a Non-zero b Undefined c Zero if initially at rest 46 A two-body collision that results in a single moving body is: a Inelastic or partially inelastic b Elastic c No collision 47 The term 'line of impact' refers to the direction of: a Force of gravity b Motion after collision c Impulse during collision 48 If object A hits B and both fly apart at right angles, momentum is: a Decreased b Increased c Conserved as vector sum 49 A mass hits a stationary wall elastically. Final velocity is: a Opposite in direction with same speed b Same direction c Zero velocity 50 Which event can cause an increase in total energy of a system? a External work or heat b No external influence c Internal forces only

Collisions II Lowersixth Science Physics

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Collisions II Lowersixth Science PhysicsVersion en ligne

par YAKILI LMS

What is conserved in a closed system during a collision?

In a perfectly inelastic collision, what happens to the objects?

Which quantity is always conserved in elastic and inelastic collisions?

If two equal masses collide head-on in 1D and stick, their final velocity is:

In a 1D inelastic collision, kinetic energy:

Two cars of equal mass collide elastically head-on. Their speeds after collision are:

What does the coefficient of restitution (e) measure?

In a 1D inelastic collision, what happens to kinetic energy?

Momentum before equals momentum after is a statement of:

In a two-dimensional collision, momentum must be conserved in:

Which factor affects the final velocity in a 2D collision?

Explosions in mechanics involve:

In a two-dimensional oblique collision, the impulse is:

If a moving object collides with a stationary one elastically in 1D, the total momentum:

When two unequal masses collide inelasticy in 1D and stick, the final velocity is:

Which equation expresses conservation of momentum in 1D?

In a perfectly inelastic collision, objects:

What is the effect of a perfectly elastic collision on kinetic energy?

A 2D collision occurs in a plane. Conservation applies to:

In an oblique collision between two bodies, impulse acts:

Explosions are modeled as:

If a skillfully designed collision is perfectly elastic, the total kinetic energy before equals:

In a 1D inelastic collision, the momentum is:

A car crash: the energy lost appears as:

What does e=0 indicate in a collision?

What does e=1 indicate?

In a two-body oblique collision, momentum components in which directions are considered?

Which quantity remains constant in a closed system during collision?

A stationary mass is hit by a moving mass head-on elastically. Final speeds depend on:

In an inelastic collision, the final velocity is determined by:

During a collision, impulse equals:

Which scenario best describes a 2D collision?

What is conserved in explosions within a system?

If two objects of unequal mass collide in 1D elastically, the lighter one:

Which factor does not affect momentum conservation?

Work done during collision affects:

Two-dimensional momentum conservation is applied to:

A completely inelastic collision results in:

In a collision, momentum before equals momentum after for:

The line of impact is perpendicular to:

Which statement is true for all collisions in a closed system?

After a perfectly elastic 1D collision, the objects:

Two masses collide at an angle. Their momentum vectors:

Which condition ensures momentum conservation in 2D?

Explosions in space: momentum of the system is:

A two-body collision that results in a single moving body is:

The term 'line of impact' refers to the direction of:

If object A hits B and both fly apart at right angles, momentum is:

A mass hits a stationary wall elastically. Final velocity is:

Which event can cause an increase in total energy of a system?