A car of mass 1250 kg is moving with a veloc | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The power $P$ delivered by the engine is given by $P = F_{engine} \cdot v$,where $F_{engine}$ is the force exerted by the engine and $v$ is the ve

Vedclass · Accepted Answer

$1/5 \ m/s^2$

Vedclass · Answer

(C) The power $P$ delivered by the engine is given by $P = F_{engine} \cdot v$,where $F_{engine}$ is the force exerted by the engine and $v$ is the velocity.$F_{engine} = \frac{P}{v} = \frac{30 	imes 10^3 \ W}{30 \ m/s} = 1000 \ N$.The net force $F_{net}$ acting on the car is the difference between the engine force and the resistive force $F_{resistive}$.$F_{net} = F_{engine} - F_{resistive} = 1000 \ N - 750 \ N = 250 \ N$.Using Newton's second law,$F_{net} = m \cdot a$,where $m$ is the mass of the car and $a$ is the acceleration.$a = \frac{F_{net}}{m} = \frac{250 \ N}{1250 \ kg} = \frac{1}{5} \ m/s^2 = 0.2 \ m/s^2$.

$A$ car of mass $1250 \ kg$ is moving with a velocity of $30 \ m/s$. If the engine delivers $30 \ kW$ of power and the resistive force acting on the car is $750 \ N$,find the maximum acceleration of the car.

Similar Questions

An electric motor exerts a force of $50 \,N$ on a cable and pulls it through $60 \,m$ in $1 \,min$. The power supplied by the motor is (in $\,W$)

$A$ girl of mass $50 \,kg$ is swinging on a cradle. If she moves with a velocity of $2 \,ms^{-1}$ in a direction making an angle of $60^{\circ}$ with the vertical, then the power generated by the gravitational force is $\left(g=9.8 \,ms^{-2}\right)$.

$A$ motor can pump $7560 \text{ kg}$ of water per hour from a well of depth $100 \text{ m}$. If the efficiency of the pump is $70 \%$, then the power of the pump is (Acceleration due to gravity $= 10 \text{ m s}^{-2}$) (in $\text{ kW}$)

Write a note on Power.

$A$ body of mass $2 \,kg$ starts from rest and moves with uniform acceleration. It acquires a velocity $20 \,ms^{-1}$ in $4 \,s$. The power exerted on the body in $2 \,s$ in watts is

Vedclass Test Series

Exam Paper Generator

Online Exam Module