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:
The average current is 19.567 A
Solution:
As per the question:
Charge, Q =
Time, t =
Now,
We know that current is constituted by the rate of transfer of the charge per unit time. Thus we can write:
I = (1)
Now, the charge that was transferred is 86 % of the original value.
Therefore,
We replace Q by 0.86Q in eqn (1):
I =
Answer: (a) The work done by the applied force on the block is 199.335J
(b) The increase in thermal energy of the floor is 48.013J
(c) The increase in the kinetic energy of the block is 81.322J
Explanation: Here is the complete question:
A horizontal force of magnitude 41.1 N pushes a block of mass 4.18 kg across a floor where the coefficient of kinetic friction is 0.594. (a) How much work is done by that applied force on the block – floor system when the block slides through a displacement of 4.85 m across the floor? (b) During that displacement, the thermal energy of the block increases by 70.0 J. What is the increase in thermal energy of the floor? (c) What is the increase in the kinetic energy of the block?
Explanation: Please see the attachments below
Weight = (mass) x (gravity)
= (75kg) x (9.8 m/s²)
= 735 kg-m/s²
= 735 newtons .
Answer:
Explanation:
From the question we are told that:
Coefficient of kinetic friction
Vertical Mass
Horizontal mass
Generally the equation for kinetic force is mathematically given by
Generally the equation for T is mathematically given by
For
Therefore substituting