Answer:
5.96 minutes
Explanation:
Two RSM students are standing 20ft
Speed of one student = 300 ft/min
Speed of other student = 200 ft/m
Time they run till they reach a distance of 3000 ft = x
Distance = Speed × time
∴ Time taken to reach a gap of 3000 ft is 5.96 minutes.
Increase 4 times
Because velocity after increase is doubled to initial velotial. And velocity in the kinetic energy is squared, so the car’s kinetic energy after increase velocity equal 4 times the initial car’s kinetic energy
- Initial velocity=0m/s=u
- Acceleration=a=5.5m/s^2
#8.1
#8.2
Use third equation of kinematics
Answer: The statement when the motion energy of an object changes, energy is being transferred is true.
Explanation:
Motion energy is also called mechanical energy and it is the summation of kinetic energy and potential energy stored in an object required for work.
As kinetic energy is the energy acquired due to motion of an object and potential energy is the energy acquired by an object due to its position.
For example, when a moving ball strikes another ball causing it to move then energy is being transferred from one ball to another.
Therefore, the statement when the motion energy of an object changes, energy is being transferred is true.
Question: A charge of 0.50 C moves horizontally in a magnetic field of 1.0 T with a speed of 4.0 x 10^⁻1 m/s. The force experienced by the charge is 7.0 N. What is the angle between the charge direction and the magnetic field?
Answer:
Θ = 6.56°
Explanation:
From the question,
Using
F = BvqsinΘ................... Equation 1
Where F = force experienced by the charge, B = magnetic field, q = Charge, Θ = angle between the charge abd the magnetic field, v = velocity.
Make Θ the subject of the equation
Θ =sin⁻¹ (Bvq/F)............... Equation 2
Given: v = 4.0×10⁻¹ m/s, B = 1.0 T, q = 0.50 C, F = 7.0 N
Θ = sin⁻¹(1×0.5×4×10⁻¹/7)
Θ = sin⁻¹(0.114)
Θ = 6.56°