Linear Momentum and Collisions MCQs | STS IBA FPSC BPSC SPSC PPSC Mcqs Test Preparation
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If two objects collide and the initial total momentum is zero, what is the total momentum after the collision?
A. Zero
B. Equal to the momentum of one object
C. Double the initial momentum
D. Equal to the total initial momentum
Answer: Zero
In a perfectly elastic collision, the relative velocity of two objects before and after the collision is:
A. Equal in magnitude but opposite in direction
B. Always the same
C. Zero
D. Different in magnitude and direction
Answer: Equal in magnitude but opposite in direction
In an elastic collision between two identical objects, what is conserved?
A. Both momentum and kinetic energy
B. Only momentum
C. Only kinetic energy
D. Neither momentum nor kinetic energy
Answer: Both momentum and kinetic energy
For an inelastic collision, what happens to the kinetic energy?
A. Some of it is converted into other forms of energy
B. It is conserved
C. It increases
D. It remains constant
Answer: Some of it is converted into other forms of energy
If a car crashes into a wall and comes to a stop, the change in momentum of the car is equal to:
A. The impulse applied by the wall
B. The force of impact
C. The car's initial kinetic energy
D. The work done by the wall
Answer: The impulse applied by the wall
When calculating impulse, which of the following factors is essential?
A. Time duration of the force application
B. Distance traveled
C. Mass of the objects
D. Initial velocity
Answer: Time duration of the force application
In a two-dimensional collision, to apply the conservation of momentum, what must be done?
A. Consider momentum separately in each direction
B. Consider only the direction of the collision
C. Apply conservation of kinetic energy
D. Use a single direction for analysis
Answer: Consider momentum separately in each direction
If an object collides with a stationary object and they stick together, what type of collision is this?
A. Perfectly inelastic
B. Elastic
C. Inelastic
D. Explosive
Answer: Perfectly inelastic
In a collision, if both objects have the same mass and collide elastically, what happens to their velocities?
A. They exchange velocities
B. Their velocities remain the same
C. They double
D. They become zero
Answer: They exchange velocities