Which has a greater momentum and greater kinetic energy-a truck with a mass of 3530 kg moving at a speed of 21 m/s or a car with a mass of
1620 kg moving at a speed of 54 m/s? Answers below are given in the
form: greater momentum, greater kinetic energy.

the car has greater momentum.

the car has greater kinetic energy.

Explanation:

FOR MOMENTUM:

Momentum is given as the product of mass and velocity of an object:

where,

P = momentum

m = mass

v = velocity

For Truck:

For Car:

Therefore, car has greater momentum.

FOR KINETIC ENERGY:

Kinetic Energy is given as:

where,

K.E = Kinetic Energy

m = mass

v = velocity

For Truck:

For Car:

Therefore, car has greater kinetic energy.

not moving. pos accel,

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27