Answer:
Magnitude of fourth displacement is approximately 95 metres,
Direction of fourth displacement is straight west.
Answer:
A mass of 4 Kg rest on the horizontal plane. The plane is gradually inclined until at an angle of θ=15
∘
with the horizontal,the mass just being to slide what is the coffeficient of static friction between the block & the surface.
Explanation:
Answer:
180.04 nm
Explanation:
λ₀ = maximum wavelength for photoelectric emission in tungsten = 230 x 10⁻⁹ m
E₀ = maximum energy of ejected electron = 1.5 eV = 1.5 x 1.6 x 10⁻¹⁹ J
λ = wavelength of light used = ?
Using conservation of energy
Energy of the light used = Maximum energy required for photoelectric emission + Energy of ejected electron
λ = 180.04 x 10⁻⁹ m
λ = 180.04 nm
Explanation:
Given that,
Average force exerting on the golf club, F = 1000 N
Mass of the ball, m = 0.045 kg
Initial speed of the ball, u = 0
The time of contact between the ball and the club,
1. Let v is the speed of the golf ball as it leaves the tee. The product of force and time is equal to the change in its momentum as :
v = 40 m/s
2. Force applied by the batter, F = 8000 N
Time,
Let J is the magnitude of the impulse delivered to the baseball. It is equal to the product of force and time as :
J = 8.8 kg-m/s
Ok first of all we have to convert in km/hr=Speed
So 30min are 0.5hours
Then we use S= distance/time = 5km/0.5 hrs = 10km/hr —> Jill speed
Then S= d/t = 10km/0.5hrs = 20km/hr —> Scott speed
So Scott rode faster