Answer:
x = 0.67 m
Explanation:
For this problem, let's use the projectile launch equations, as the jug goes through the bar, it comes out with horizontal speed vx = 1.3 m / s, which does not decrease as there is no friction.
Let's find the time or it takes to get to the floor
y = y₀ + v_{oy} - ½ g t²
in this case I go = 0 and when I get to the floor y = 0
0 = y₀ + 0 - ½ g t²
t² = 2y₀ / g
t² = 2 1.3 / 9.8 = 0.2653
t = 0.515 s
now let's find the distance traveled in this time
x = vx t
x = 1.3 0.515
x = 0.6696 m
x = 0.67 m
Sonography is most likely because it has good resolution without radiation.
Answer:
C
Explanation:
- Let acceleration due to gravity @ massive planet be a = 30 m/s^2
- Let acceleration due to gravity @ earth be g = 30 m/s^2
Solution:
- The average time taken for the ball to cover a distance h from chin to ground with acceleration a on massive planet is:
t = v / a
t = v / 30
- The average time taken for the ball to cover a distance h from chin to ground with acceleration g on earth is:
t = v / g
t = v / 9.81
- Hence, we can see the average time taken by the ball on massive planet is less than that on earth to reach back to its initial position. Hence, option C
Answer:
142.296 Nm.
Explanation:
Torque: This is the force that tend to cause a body to rotate or twist. The S.I unit of torque is Nm.
From the question,
T = F×r.................... Equation 1
Where T = Torque, F = Force, r = radius of the circle.
Note: F is the weight of the bicyclist.
Then,
F = W = mg............... Equation 2
Substitute equation 2 into equation 1
T = mgr................... Equation 3
Given: m = 88 kg, g = 9.8 m/s², r = 0.33/2 m
T = 88(9.8)(0.33)/2
T = 142.296 Nm.
Answer:
Explanation:
The collision is elastic as no frictional force exists .
Both momentum and energy will be conserved.
We shall apply velocity formula applicable in respect of elastic collision
m₁ and m₂ be mass of red and green T shirt player , u₁ and u₂ be their initial velocity , v₁ and v₂ be their final velocity
v₂ = (m₂-m₁)u₂ / ( m₁+m₂) + 2 m₁u₁ / ( m₁+m₂)
Given m₁ = 40 kg , m₂ = 60 kg , v₂ = 2 m /s , u₁ = ? , u₂ = 0
Put the values in the equation
2 = 0 + 2 x 40 x u₁ / ( 40 + 60 )
u₁ = 2.5 m /s .
Initial speed of red T- shirt .