The center of mass of a system of particles has a constant velocity if: the velocity of the center of mass is initially zero the external forces acting on particles of the system sum to zero the force acts at the center of mass the velocity of the center of mass is initially zero

Q: The net force acting on a system is zero. Which one of ?the following is true .The momentum of the…

A: SOlution: Given that if net force is zero on the system, then what is it momentum

Q: In an elastic collision Select one: a. KE is conserved but not momentum b. Momentum and KE are both…

A: Given: In an elastic collision Select one: a. KE is conserved but not momentum b. Momentum and KE…

Q: The momentum of an isolated system is conserved...   only in inelastic collisions.      in both…

A: The law of conservation of linear momentum is a consequence of Newton's second law of motion. The…

Q: 0.046-kg tennis ball is launched from a 1.35-kg homemade cannon. If the cannon recoils with a speed…

A: 0.046-kg tennis ball is launched from a 1.35-kg homemade cannon. If the cannon recoils with a speed…

Q: Two balls collide head-on. The initial velocity of ball 1 is 0.95 m / s in an easterly direction.…

A: Ghff

Q: A rocket has an initial mass m, = 2.8X10°kg of which 2.1X10°kg was fuel. The fuel was burned with a…

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Q: TRUE OR FALSE Two bodies are perfectly inelastic if they separate after collision. Kinetic energy…

A: In this question we are given with three sentences and we have to answer whether they are true or…

Q: The total momentum of a system is conserved if the only forces of interaction regarding the objects…

A: According to Newton 2nd law if net forces acting on any object is non zero then there will be change…

Q: A 2.5-kg object is moving to the right at 10 m/s and collides with another object of mass 1.5 kg…

A: Given  mass(m1)=2.5 kg speed of first object (v1→)=10 i^ mass(m2)=1.5 kg speed of second object…

Q: A block of wood of mass 2 kg is placed over the muzzle of a rifle, and a bullet of mass 25 g is…

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Q: Which of the following statement is false? A Momentum is a vector quantity B Impulse equals change…

A: To identify : The false statement out of the given five statements

Q: One object is at rest, and another is moving. The two collide in a one-dimensional, completely…

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Q: Two bodies of equal mass m collide and stick together. The quantities that always have equal…

A: The change in momentum is having equal magnitude and oppositely directed.

Q: Two particles with masses in the ratio 1 : 9 are moving with equal kinetic energies. The magnitude…

A: Given data:  m1/m2 = 1/9 The kinetic energies of particles are equal KE1 = KE2 Required: The ratio…

Q: rocket has a total mass of 100000 kg and a burnout mass of 10000 kg including engines, shell and…

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Q: In an inelastic collision involving two interacting objects, the final kinetic energy of the system:

A: An inelastic collision is a type of collision in which the momentum of the system is conserved but…

Q: An object with a mass of 7.00 g is moving to the right at 14.0 cm/s when it is overtaken by an…

A: Mass of objects,  m1 = 7.00 g m2 = 30.0 g Velocities of objects,  v1 = 14.0 cm/s  v2 = 17.0 cm/s.

Q: A car is moving northward and speeding up. The momentum of the car is a. increasing b. decreasing c.…

A: Given data:  Car is moving in North direction And speed increases

Q: Two balls of masses 2 kg and 3 kg are moving with velocities 2 m/s and 3 m/s towards each other. If…

A: suppose the 2 kg mass travels towards right and the 3 kg mass towards left. the conservation…

Q: Two identical satellites in space collide. Satellite A is a rest, and B hits it with a speed v.…

A: Option A is the right answer  This was an elastic collision

Q: In a perfectly ELASTIC collision between two perfectly rigid objects the momentum of the system is…

A: elastic energy conserves both kinetic energy and momentum of the system

Q: From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m/s.…

A: Given : Mass of the rifle (m1) = 4 kg Mass of the bullet (m2) = 50 g =  0.05 kg Recoil velocity of…

Q: A rocket is fired in a gravity-free environment in deep space. The rocket has an initial mass of…

A: Given: Initial mass, m=9000 kg Velocity, v=2375 m/s Acceleration, a=49.50 m/s2 Time, t=2 s

Q: A ball of 0.4 kg mass and a speed of 3 m/s has a head-on, elastic collision with another 0.4 kg mass…

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Q: A body weighing 2 kg moves with a velocity of 3 m/s and overtakes another body weighing 3 kg moving…

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Q: wo cars are approaching each other from opposite sides. Car 1 has a mass of 300 [kg] and moves at a…

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Q: A 2 kg mass moving to the right makes an elastic head-on collision with a 4 kg mass moving to the…

A: Let the direction along right be positive  And the direction along left be negative M1 = 2 kg  M2 =…

Q: A girl of mass mg is standing on a plank of mass mp. Both are originally at rest on a frozen lake…

A: The girl plank system is isolated, so horizontal momentum is conserved.   The expression for the law…

Q: A hockey player applies an average force of 500 N to a 5.25 kg hockey puck for a time of 0.25…

A:

Q: A hockey player applies an average force of 80 N to a 0.25 kg hockey puck for a time of 0.10 s.…

A: Given: Force applied = 80 N Mass of Hockey puck = 0.25 kg Time = 0.2 sec. To Find:Impulse…

Q: Three blocks, each of mass 1.2 kg, sit along a straight line on a frictionless surface.  The first…

A: The mass of blocks, m1 = m2 = m3 = m = 1.2 kg The velocity of the first block, v1 = 2.8 m/s

Q: A ball of mass is 0.261 kg is dropped vertically from a height of 0.67 m and bounces back to the…

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Q: A ball of mass 1kg with 2 m/s hits another ball 2 kg at rest if the first ball comes to rest after…

A: Masses of the two balls are m1 = 1 kg and m2 = 2 kg Initial velocity of the first ball is u1 = 2 m/s…

Q: A 5 kg box is sliding on a frictionless surface at 10 m/s. It has an elastic collision with a 10 kg…

A: Given: Mass(m1)=5 kg Mass(m2)=5 kg Velocity(u1)=10 m/s Velocity (u2)=3 m/s Find, Velocity of two…

Q: An object X of mass 5 kg moving Eastward at 4 m/s collides with a stationary object Y of mass 4.5…

A: Given data The mass of the object X is mx = 5 kg The initial velocity of the object X is ux = 4 m/s…

Q: Consider a system of two identical particles. One of the particle is at rest and other has an…

A: We know thatCentre of mass acceleration is given byacom=m1a1+m2a2m1+m2Herem1,m2=Mass  of…

Q: during an explosion, the total kinetic energy is always conserved 2. An impulse always goes in the…

A: 1. True 2. True 3. True ( momentum is conserved in a collision)

Q: The momentum of an isolated system is conserved in neither ofelastic or inelastic collisions. in…

A: Let's check each option one by one 1.  The momentum of an isolated system is conserved in neither of…

Q: A shell of mass m moving with velocity v suddenly breaks into 2 equal pieces. The one mass remains…

A: Given: Mass of shell: m Velocity of full shell: v Mass of each piece after breaking: m2 Velocity of…

Q: A helicopter flies at a speed of 275 m/s. The pilot fires a missile forward out a gun barrel at a…

A: Given: Helicopter's speed, vh=275 m/s Missile's speed, vm=700 m/s Helicopter's mass, mh=5000kg…

Q: A 1.0 kg ball moving at 2 m/s in the +x-direction collides head-on with a 2 kg ball moving at 3 m/s…

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Q: Consider a rocket that is stationary in free space (no gravity) which has a total mass of 70 million…

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Q: Impulse is equal to: 1. The average force multiplied by the time interval for which it acts on an…

A: solution

Q: A bullet of mass 3.6 g strikes a ballistic pendulum of mass 1.0 kg. The center of mass of the…

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Q: In a system with two moving objects, when a collision occurs between the objects: the total kinetic…

A: Collision is of two type  Elastic collision in which momentum and kinetic energy both conserved…

Q: Two blocks of mass 0.1 kg and 0.2kg approach each other on a horizontal plane at velocities of 0.4…

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Q: The impulse experienced by a body is equivalent to the body’s change in velocity. kinetic energy.…

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Q: An unstable particle of mass 450kg initially at rest disintegrates into three sub-particles.one of…

A: Given: Initial mass (M) = 450 kg mass of the first sub particle (m1) = 150 kg mass of the second sub…

Q: Which of the following statements are true about elastic and inelastic collisions? Perfectly…

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Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”