Momentum can be defined by the formula p=m*V (where m is mass and V is velocity) so if we plug in these numbers:
p = 2kg * 6m/s
p = 12 kgm/s
Answer:
Explanation:
Given that,
The mass of a bag of acorns, m = 8.5 kg
The force acting on the bag = 80 N
The force of friction = 32 N
We need to find the acceleration of the bag of acorns.
Net force acting on it is = 80 N - 32 N
= 48 N
Let a be the acceleration of the bag of acorns. So,
F = ma
So, the acceleration of the bag of acorns is .
The answer is 167 pounds.
Answer:
1) Skis have a large area to reduce the pressure on the snow. This ensures that the skis do not sink into the snow too far.
2) The pressure under the studs on the soles of football shoes is high enough for them to sink into the ground, which gives extra grip.
3) A vacuum cleaner has a fan inside that creates a low pressure inside the device. Consequently, air and dirt particles are sucked into the device.
Answer:
The activity of cobalt-60 after 72 hours is 34.895 MBq
Explanation:
A(t) = Ao(0.5)^t/t1/2
A(t) is the activity of cobalt-60 after time t
Ao is the initial activity of cobalt-60 = 35 MBq
t is time taken to reduce in activity = 72 hours = 72/24 = 3 days
t1/2 is the half-life = 0.693 ÷ decay constant = 0.693 ÷ 0.001/day = 693 days
A(72) = 35(0.5)^3/693 = 35 × 0.5^0.00433 = 35 × 0.997 = 34.895 MBq