a car gets accelerated from rest and acquires a speed of 60m/s. if the car covers a distance of 90m, calculate its acceleration

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car