You hold block A with a mass of 1 kg in one hand and block B with a mass of 2 kg in the other. You release them both from the sa
1 answer:
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(a)
The work done on the projectile is 9375 joule.
The work on the projectile is calculated as
W=F×d
=1250×7.5
=9375 joule
(b)
The speed of the projectile after 7.5 m is 27.38 m/s
First we need to find out the acceleration of the projectile
F=m×a
1250=25×a
a=50 m/
Now the velocity of the projectile after 7.5 m is calculated as
v^2=u^2+2a×s
v^2=0+2×50*7.5
v=27.38 m/s
Answer:
18s
Explanation:
Given parameters:
Work done by hamster = 180J
Power of hamster = 10W
Uknown:
Time taken for the hamster to generate the work = ?
Solution:
Power can be defined as the rate at which work is being done by a body. It is related to both work done and time by the expression below;
Power =
Time taken =
Time taken = = 18s