Mechanics | Relativity Answers

With an average acceleration of −1.0 m/s2,
how long will it take a cyclist to bring a bicycle with an initial speed of 14.6 m/s to a complete
stop? Answer in units of s

Two bodies A and B of equal masses m lie on a smooth frictionless horizontal table. They are initially separated by a distance 2l and are connected by a thread of length 2l. The thread is pulled at its midpoint O by a constant force F at right angle to AB. Find the acceleration of A and B in the direction at right angles to the direction of F as a function of the displacement(x) of the midpoint O

A car drives in a highway exceeding the seed limit with a constant seed of 160 km/h and passes a motion less police car. Emediately the police car commences the persue in the exact instant the first car passes the police car. The police car accelerates the vehicle at 3 m/s^2 constantly if it continues at thi rate; calculate the time it will spend to catch up with the civilian car and the distance it will take to do so.

Sally travels by car from one city to another. She drives for 26.0 min at 65.0 km/h, 54.0 min at 33.0 km/h, and 44.0 min at 62.0 km/h, and she spends 15.0 min eating lunch and buying gas.

A car is decelerating at -2m/s² for five minutes. If initial velocity is 72 km/h then find its final velocity

If a person jogs around a 400 meter track 4 times and starts and ends in the same place what is the displacement in meters (m) that the jogger has ran?

Suppose the 1.0m pendulum were operated on the moon. What would its period be there? (Gm=g/6)

Sally travels by car from one city to another. She drives for 28.0 min at 81.0 km/h, 33.0 min at 36.0 km/h, and 32.0 min at 69.0 km/h, and she spends 12.0 min eating lunch and buying gas.
(a) Determine the average speed for the trip.

(b) Determine the total distance traveled.

A football quarterback throws a pass at an angle of 38.1°. He releases the pass 3.50 m behind the line of scrimmage. His receiver left the line of scrimmage 2.8 s earlier, going straight down-field at a constant speed of 7.50 m/s. With what speed must the quarterback throw the ball so that the pass lands gently in the receiver's hands without the receiver breaking stride? Assume that the ball is released at the same height it is caught and that the receiver is straight downfield from the quarterback at the time of release. (Ignore any effects due to air resistance.)

the velocity of the stream and boat are 6 & 12 km per hour.the width of the river is 10 km.to cross the river across to the shortest distance,in which direction the boat has to move??