Classical Mechanics Answers

A projectile is fired horizontally from a height of 10 m above level ground. The projectile lands a horizontal distance of 15 m from where it was launched.

Two arrows are shot from opposite sides of a 4.0m deep canyon. The arrows land in the same spot on the floor of the canyon at the same time. One is shot at an 80 degree angle, the other is shot at a 20 degree angle. The total time it takes the arrow shot at 80 degrees to land is 14 seconds. How do you determine the initial velocity of either of the arrows

CHECKPOINT
1. Calculate the momentum in each of these examples:
(a) an ice skater with a mass of 64 kg glides at 3.75 m s−1
(b) a rugby player of mass 120 kg runs at a speed of 4.9 m s−1
(c) an ant of mass 5 milligrams moves at a speed of 5
centimetres per second.

4. Estimate the force applied by a person throwing a Frisbee.

Given that vector A =5i-7j+3k and B=-4i+4j-8k,find (I)AxB(ii)BxA

The rectilinear motion of a body with a mass of 2 kg is given by the law s= 2t +t^2.
What is the force acting on the body?

Check whether V = R^2 is a vector space with respect to the operations (x1,y1) + (x2,y2) = (x1 + x2 - 2, y1 + y2 - 3) and k(x,y) = (kx + 2k -2, ky -3k + 3), k is a real number

Find a basis {p(x),q(x)} for the kernel of the linear transformation L:P3[x]→R defined by L(f(x))=f′(−3)−f(1) where P3[x] is the vector space of polynomials in x with degree less than 3.

if a beam is12"x12"x 23' long and weighs 3289lbs. 143bs per foot. how much weight is applied if the beam was to be lifted straight up from one end

a wood block of mass m=300g rests on a larger wood block of mass m=4kg that rests a wooden table.the coefficients of static and kinetic friction between al surfaces are 0.4 and 0,2 respectively.a horizontal force ,f, is applied to the lower block