Answer:
Inertia
Explanation:
When the planes moves downward a speed, the weight of the person will decrease a bit due to the amount of g decreases for that particular instant. The person is now experiencing a less than actual weight called as apparent weight due to the upward superposition of inertia on the body as we can see in w = m g .
Answer:
Approximately
.
Explanation:
Make use of the fact that total momentum is conserved in collisions.
The momentum of an object of mass
and velocity
is
.
The momentum of the two trolleys before the collision would be:
.
.
Thus, the total momentum of the two trolleys right before the collision would be
.
Since the two trolleys are stuck to one another after the collision, they could modelled as one big trolley of mass
.
The momentum of the two trolleys, combined, is conserved during the collision. Thus, the total momentum of the new trolley of mass
would continue to be
shortly after the collision.
Rearrange the equation
to find the velocity of the two trolleys combined:
.
Answer: 
Explanation:
The angular diameter
of a spherical object is given by the following formula:

Where:
is the actual diameter
is the distance to the spherical object
Hence:

This is the angular diameter
Answer:
The maximum speed of car will be 20.5m/sec
Explanation:
We have given mass of car = 1100 kg
Radius of curve = 82.3 m
Static friction 
We have to find the maximum speed of car
We know that at maximum speed centripetal force will be equal to frictional force 

So the maximum speed of car will be 20.5m/sec