e. (3.001) 51. A sled accelerates down a hill and then slows down after it reaches a flat portion of ground. The speed of the sled s(t) (in ft/sec) at a time i (in sec) after movement begins can be approximated by: 1.5 for 0 SIS20 s()- 30 for 20 < rs 40 19

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Only question # 51 pls.
e. 1(3.001)
51. A sled accelerates down a hill and then slows down after it reaches a flat portion of ground. The speed of the sled s(t) (in ft/sec) at a time i (in sec) after movement begins can be approximated by:
(1.5t
for 0 SIS20
s(1) -
30
for 20 <IS 40
- 19
Determine the speed of the sled after 10 sec, 20 sec, 30 sec, and 40 sec. Round to 1 decimal place if necessary.
52. A car starts from rest and accelerates to a speed of 60 mph in 12 sec. It travels 60 mph for 1 min and then decelerates for 20 sec until
be modeled by:
:comes to rest. The speed of the car s(t) (in mph) at a time t (in sece
for 0sts 12
12
s(1) =
60
for 12 <IS72
(92 - 1? for 72 <IS 92
Transcribed Image Text:e. 1(3.001) 51. A sled accelerates down a hill and then slows down after it reaches a flat portion of ground. The speed of the sled s(t) (in ft/sec) at a time i (in sec) after movement begins can be approximated by: (1.5t for 0 SIS20 s(1) - 30 for 20 <IS 40 - 19 Determine the speed of the sled after 10 sec, 20 sec, 30 sec, and 40 sec. Round to 1 decimal place if necessary. 52. A car starts from rest and accelerates to a speed of 60 mph in 12 sec. It travels 60 mph for 1 min and then decelerates for 20 sec until be modeled by: :comes to rest. The speed of the car s(t) (in mph) at a time t (in sece for 0sts 12 12 s(1) = 60 for 12 <IS72 (92 - 1? for 72 <IS 92
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