Question

What force is required to slow a 1250-kg car traveling 115 km/h to
30.0 km/h within 3.50 s? (a) How far does the car travel during its
deceleration? (b) How long does it take for the car to come to a
complete stop at this same rate of deceleration?

Answer #1

A car of 1000 kg with good tires on a dry road can decelerate
(slow down) at a steady rate of about 5.0 m/s2 when braking. If a
car is initially traveling at 20 m/s (45 mi/h),
(a) How much time does it take the car to stop?
(b) What is its stopping distance?
(c) What is the deacceleration?
(d) How big is the net force to be applied to stop this car?
(e) Calculate the work done by this...

the
driver of a car that is travelling at 8.5 km/h slams the breaks and
comes to a complete stop in 1.69 sec. How far, in meters, does the
car travel before stopping

A car traveling 69 km/h is 247 m behind a truck traveling 93
km/h. How long will it take the car to reach the track? Calculate
to one decimal

A 1,500 − ?? car is traveling at 100 ??/h. The driver sees a
slow truck ahead and slows down to 60 ??/h. a. Find the initial and
final energy of the car and the work done on it to slow it down. b.
If the car completes its deceleration in 9.0 ?, find the mean
braking power. c. A typical car can be made to stop from 100 ??/h
in a minimum distance of 60 ? if the pavement...

1. A car traveling 69 km/h is 247 m behind a truck traveling 93
km/h. How long will it take the car to reach the track? Calculate
to one decimal
2.Suppose one of Napoleon cannons has a muzzle speed of 32m/s.
It was aimed at 54 ◦ angle. What height can the cannon
ball reach? Use g = 9.8 m/s2
Calculate to one decimal
3.A girl throws a rock horizontally, with a velocity of 13 m/s,
from a bridge. It...

A car is traveling at a steady 70 km/hkm/h in a 50 km/hkm/h
zone. A police motorcycle takes off at the instant the car passes
it, accelerating at a steady 8.5 m/s^2 to reach the 70 km/h. How
far is the motorcycle from the car when it reaches this speed?
(Time to catch up to the car= 2.3 seconds)

A car traveling 57.8 km/h is 21.7 m from a barrier when the
driver slams on the brakes. The car hits the barrier 2.22 s later.
(a) What is the car's constant deceleration magnitude before
impact? (b) How fast is the car traveling at impact?

A car traveling 54.8 km/h is 23.3 m from a barrier when the
driver slams on the brakes. The car hits the barrier 1.84 s later.
(a) What is the car's constant deceleration
magnitude before impact? (b) How fast is the car
traveling at impact?

A 675 kg car accelerates from 54.0 km/h to come to a
stop in a distance of 175 m.
Determine the net work done on the car
Determine the force acting on the
car

A speeder passes a parked police car with a speed of 65 km/h in
a 50km/h zone. One second after the speeder has passed the police
car, the police begin his pursuit. The police car accelerates with
constant acceleration of 2m/s2
(i) How long does it take for the police to catch the speeding
car?
(ii) How far did the police car travel before police caught up
with the speeder? (iii) What is the speed of the police car when...

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