# Physics & Chemistry (4º ESO)

• (#7425)   Seleccionar

Relationship between linear and angular quantities (7425)

A car that starts from and uniformly accelerates at for 5 s.

a) Calculate the final velocity and the displacement of the car.

b) What is the diameter of the tire if the angular displacement is 60 rad?

c) What is the final angular velocity and angular acceleration of the tires?

• (#7424)   Seleccionar

Angular position and velocity of a wheel (7424)

The angular velocity of a wheel of a bike is , and its angular acceleration is .

a) What is the angular position and angular velocity at the time t = 5 s?

b) What is the angular position and angular velocity at the time t = 5 s, expressed in revolutions?

c) What is the final velocity and displacement of the bike at t = 5 s if the tire has a diamater of 1 meter?

• (#7068)   Seleccionar

Acceleration of an elevator with different lectures of the weighing scale (7068)

A person of mass 70 kg stands on a weighing scale in an elevator which is moving and observes different lectures on it. Determine the acceleration of the elevator and if it is moving up, down, accelereting, breaking or not moving if the values of the scale are: a) 66 kg, b) 74 kg and c) 70 kg.

• (#3441)   Seleccionar

Force units 0001

How many newtons of force are represented by ?