T1-SBQ2-G11-2021

A compact car, with mass 725 kg, is moving at 31.9 m/s toward the east. Find the magnitude and direction of itsmomentum.

• 23127. 5 kgm/s East

• 43127.5 kgm/s East

• 23000.0 kgm/s West

• 63127.5 kgm/s West

The driver of a compact car, suddenly applies the brakes hard for 2.0 s. As a result an average force of is 5x10³ N exerted on the car to slow it down. What is the magnitude and direction of the impulse on the car?

• -14000 Ns

• -10000 Ns

• +12000 Ns

• +10000 Ns

A driver accelerates a 240.0 kg snowmobile, which results in a force being exerted that speeds up the snowmobilefrom 6.0 m/s to 28.0 m/s over a time interval of 60.0 s. What is the snowmobile's change in momentum?

• 5220 kgm/s

• 5280 kgm/s

• 5260 kgm/s

• 5480 kgm/s

A driver accelerates a 240.0 kg snowmobile, which results in a force being exerted that speeds up the snowmobilefrom 6.0 m/s to 28.0 m/s over a time interval of 60.0 s. What is the magnitude of the average force that is exerted on thesnowmobile?

• 92 N

• 88 N

• 90 N

• 86 N

A 7.0 kg object, moving with initial speed v_i of 2.0 m/s, receives an impulse along the direction of its motion. Theimpulse graph is shown below. Find the resulting final speed v_f and direction of motion after the impulse.

• 1.5 m/s East

• 1.9 m/s East

• 1.3 m/s West

• 1.7 m/s West

The momentum gained by a base-ball is 15 kgm/s in the direction of the force acting on it. Suppose a batter hits a fastbase-ball. Assume the position direction is toward the pitcher. Before the collision of the ball and the bat, the ball, with a mass of 0.145 kg, has a velocity of − 47 m/s. What is the base-ball's momentum before the collision?

• − 6.8 kgm/s

• + 6.2 kgm/s

• + 6.6 kgm/s

• − 6.4 kgm/s

Which is the product of a rotating object's moment of inertia and angular velocity?

• Angular momentum

• Impulse

• Angular impulse

• Momentum

Which is represented by the following equation?

F.Δt = P_f - P_i

• angular momentum

• impulse

• impulse - momentum theorem

• angular impulse - angular momentum theorem

Which are the units for momentum?

• kgm/s

• kgm/s²

• m/s²

• kg/s

A DVD of moment of inertia I=2.7x10^-5 Kgm² rotates at 160 radians per second when the inner edge is being read and at 66 radians per second when the outer edge is being read. What is the change in angular momentum as the disc is read from the inner edge to the outer edge?

• - 0.0029 kgm²/s

• - 0.0025 kgm²/s

• + 0.0023 kgm²/s

• +0. 0027 kgm²/s