Question

Mandy is driving her car east at a constant speed of **65
mi/h**.

Paul is driving his car south at a constant speed of **60
mi/h**.

Find the rate at which the distance of Mandy and Paul is increasing after 2 hours.

Answer #1

A car travels along a straight line at a constant speed of 44.5
mi/h for a distance d and then another distance d in the same
direction at another constant speed. The average velocity for the
entire trip is 33.5 mi/h.
(a) What is the constant speed with which the car moved during
the second distance d? mi/h
(b) Suppose the second distance d were traveled in the opposite
direction; you forgot something and had to return home at the...

A man is driving his car with speed 53.0 mi/h on a horizontal
stretch of road.
(a)
When the road is wet, the coefficient of static friction between
the road and the tires is 0.105. Find the minimum stopping distance
(in m).
m
(b)
When the road is dry,
μs = 0.595.
Find the minimum stopping distance (in m).
m

A plane flying horizontally at an altitude of 1 mi and a speed
of 470 mi/h passes directly over a radar station. Find the rate at
which the distance from the plane to the station is increasing when
it is 2 mi away from the station. (Round your answer to the nearest
whole number.)
mi/h

A plane flying horizontally at an altitude of 2 mi and a speed
of 540 mi/h passes directly over a radar station. Find the rate at
which the distance from the plane to the station is increasing when
it is 4 mi away from the station. (Round your answer to the nearest
whole number.)
mi/h

One car leaves an intersection traveling north at 48 mi/h.
Later, a second car leaves that same intersection traveling east at
90 mi/h. At what rate is the distance between the cars increasing
when the first car is 96 miles north of the intersection and the
second car is 72 miles east of the intersection?

Why driving slowly is recommended. A car traveling at 60-mi/h
can stop within a distance
d=20m. Ifthesamecarwastravelingat100- mi/h, a) how much distance
(d ) is required to
stop the car? b) What is its acceleration (a). Your answer must
be in SI units.

Two buses are driving along parallel freeways that are 20 mi
apart, one heading east and the other heading west. Assuming that
each bus drives a constant 50 mph, find the rate (in mph) at which
the distance between the buses is changing when they are 29 mi
apart, heading toward each other.

A plane flying horizontally at an altitude of 1 mi and a speed
of 480 mi/h passes directly over a radar station. Find the rate at
which the distance from the plane to the station is increasing when
it is 4 mi away from the station. (Round your answer to the nearest
whole number.)

A cyclist leaves her house at 8:00AM and begins travelling
directly east at 20 km/h. Fif- teen minutes later, her friend, who
lives 2 km directly south, gets in his car and begins to travel
directly west at 50 km/h. Find the rate at which the distance
between the cyclist and the driver is changing at 8:30AM.

Paul is driving south down Pembina highway at a constant speed
of 20 m/s. He sees a truck in one of the north-bound lanes. The
truck is initially stopped at the next traffic light, which is 500
m away. At this point, the light turns green and the truck starts
accelerating northwards (towards Paul) at a constant acceleration
of 1.2 m/s2. At what distance from the position where Paul first
saw the truck, do they pass each other?

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