This speed limit sign actually represents two components of motion: speed and direction. Objects have the same velocity only
if they are moving at the same speed and in the same direction
. … Objects represented by B and C have different velocities because they are moving in different directions and at different speeds.
Is it possible for two objects to have different speeds when their momenta have the same magnitude explain your answer?
d. FALSE – Two colliding objects will only experience the
same velocity
change if they have the same mass and the collision occurs in an isolated system. However, their momentum changes will be equal if the system is isolated from external forces.
How can two objects have the same momentum but different velocities?
– It’s vector quantity represented by cross product of mass & velocity of object. – Momentum have same direction as that of velocity. – Two bodies with same linear momentum but different masses have different velocities. i.e.
p1 = p2 & m1 ≠ m2, then v1 ≠ v2.
Can two objects with the same mass and the same rotational speed have different values of angular momentum?
Yes they can have different angular momentum
because of different values of moment of inertia I.e. mass distribution about axis.
In what two cases the speed and the velocity of an object are the same?
Answer: speed is equal to velocity
when the body goes in definite direction
.
What happens when two objects of the same mass collide?
When two objects with the same mass collide,
Newton’s laws tell us that they will accelerate the same amount but in opposite directions
. Recall that force, velocity, and acceleration have both magnitude and direction. We use positive and negative signs to indicate the direction of each of these quantities.
What happens when two objects with the same momentum collide?
Momentum is a vector quantity that depends on the direction of the object. … When two objects collide
the total momentum before the collision is equal to the total momentum after the collision
(in the absence of external forces). This is the law of conservation of momentum. It is true for all collisions.
Is momentum conserved when a ball is dropped?
Momentum is conserved only for a closed system
. … When a body drops from a height, it gains momentum down, while the earth gains the same momentum up. Since the earth is very massive, you can not observe its motion in reaction. Same goes for a ball rolling downhill.
Is momentum conserved bouncing ball?
conservation of momentum: The amount of momentum in a system remains the same after a collision. elastic collision: A collision in which all of
the momentum is conserved
. For example, a ball that bounces back up to its original height.
Is impulse the same for both objects?
Impulse is force multiplied by time, and
time of contact is the same for both
, so the impulse is the same in magnitude for the two trucks.
Is angular momentum always conserved?
Just as linear momentum is conserved when there is no net external forces,
angular momentum is constant or conserved when the net torque is zero
.
Does inertia depend on speed?
How much net force is required to keep the object moving at this speed and in this direction? An object in motion will maintain its state of motion. The presence of an unbalanced force changes the velocity of the object. … Tosh argues that
inertia does not depend upon speed, but rather upon mass
.
Does moment of inertia depend on mass?
The moment of inertia
depends not only on the object’s mass
, but also the distribution of that mass in relation to the axis of rotation. When an ice skater in a spin pulls their arms in, their mass stays the same, but their moment of inertia decreases.
Is speed equal to velocity?
Speed is the time rate at which an object is moving along a path, while
velocity is the rate and direction of an object’s movement
. … For example, 50 km/hr (31 mph) describes the speed at which a car is traveling along a road, while 50 km/hr west describes the velocity at which it is traveling.
What are the similarities and differences between speed and velocity?
Speed and velocity both represent a way to measure the change in position of an object relative to time. In fact, for
a straight line motion
, the speed and velocity of an object are the same (since distance and displacement will be the same). Speed and velocity are measured in the same units: meters per second or m/s.
What are 5 differences between speed and velocity?
| Speed Velocity | Speed is a scalar quantity Velocity is a vector quantity. | Speed ascertains how fast a body moves. Velocity ascertains the object’s speed and the direction it takes while moving. |
|---|
