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A golf ball is hit at an angle θ=45° to the horizontal with an initial speed v0. A vertical wall of height h=10m lies a distance d=20m away. Determine the minimum initial speed v0 required for the ball to clear the wall. Air resistance is negligible.

(I have a picture of a full explanation saved on my computer and I can show this or recreate using the whiteboard during interview if required.) Physics : Newton's 2nd Law, 'suvat' equations. Setting up prob...
Answered by • Physics tutor
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A drone is hovering at a constant height above the ground. The mass of the drone is 7 kg. The mass of the package is 3 kg. Calculate the upward force of the Drone.

To answer this Question we will use the equation derived from Newtons second law of motion, F=ma or in this case W=mg as it is the mass of the object being accelerated by gracity, giving us it's weight The a...
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Answered by Finn T. • Physics tutor
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A launcher 1m tall fires tennis balls with a velocity of 15m/s at an angle of 20 degrees from horizontal. Neglecting air resistance, calculate the maximum height, time of flight and distance traveled by the ball.

While conceptually simple, drawing on understanding of kinematic equations and vectors, these projectile problems require attention to the details of the problem such as accounting for the launch height and ...
AL
Answered by Andrei L. • Physics tutor
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In a lab a hydrogen spectral line is observed to have a wavelength of 656nm. This line is observed in a distance galaxy to have a wavelength of 661nm, what is the recessional velocity of the galaxy?

This question is dealing with phenomena of Redshift, where wavelengths are shifted due to movement between observer and event. The key information to extract from the question is we have a rest wavelength, a...
JM
Answered by Jamie M. • Physics tutor
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An exoplanet of mass 1.36x10^26 kg is orbiting a star of mass 3.2x10^31 kg at a distance of 1 AU. What is the magnitude of the gravitational force between the two?

We use Newtons equation for gravitational force. F=GMm/r 2 .1 AU is the mean distance at which the Earth orbits the Sun, taken to be: 1.49x10 11 m.Substituting in the numbers we find the magnitude of the for...
RC
Answered by Rory C. • Physics tutor
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