Shawn and his bike have a total mass of 52.8 kg. Shawn rides his bike 0.91 km in 13.1 min at a constant velocity.?
Shawn and his bike have a total mass of
52.8 kg. Shawn rides his bike 0.91 km in
13.1 min at a constant velocity.
The acceleration of gravity is 9.8 m/s
What is Shawn’s kinetic energy?
- MyRankLv 61 month ago
Mass (m) = 52.8kg
Distance (d) = 0.91km = 0.91 x 10³m
Time (t) = 13.1mins = 786sec
Acceleration due to gravity (g) = 9.81m/sec²
Kinetic Energy (K.E) = ?
We know that:-
Kinetic Energy (K.E) = ½mv² = ½ x 52.8kg x [(0.91 x 10³m) / 786sec]²
= ½ x 52.8 x (1.158)²
∴ Kinetic Energy (K.E) = 35.4JSource(s): https://myrank.co.in/
- SpacemanLv 71 month ago
d = distance that Shawn has ridden = 0.91 km = 910 m
t = time that Shawn has ridden = 13.1 min = 786 s
v = velocity = d / t = 1.157760814 m/s
m = combined mass of Shawn and his bike = 52.8 kg
KE = kinetic energy to be determined
KE = 0.5mv²
KE = 0.5(52.8 kg)(1.16 m/s)²
KE = 35.38682672 J ≈ 35.4 J
- Andrew SmithLv 71 month ago
This is a conversions problem. We know that Ek = 1/2 m v^2
but to get the energy in known units the velocity MUST be in metres per second. v = s/t s = 0.91 km -> 910 m. t= 13.1 min -> 13.1*60s -> v= 910/(13.1*60)
Shawn's bike is a superlightweight bike of 8.2 kg giving HIS mass as 44.6 kg
so Ek Shawn= 1/2 * 44.6 *(910/(13.1*60) )^2 = 29.9 J
- 1 month ago
the answer was 35.4 J, found by whome
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- Anonymous1 month ago
speed = distance / time
convert km/min to m/sec
KE = 1/2 * mass * speed^2
< what do you mean?? >
You need to start paying attention in class or you'll be redoing it. Your choice.