HW-2 Requires Respondus Lockdown Browser

A bicycle moves from rest to 5m/s in 5 sec. What is the acceleration of the bicycle? (Use m/s^2) for the units.)

1 m/s^2

How long does a car whose acceleration is 3m/s^2 need to go from 10 m/s to 40 m/s?

10 s

At the olympics, a male runner runs the 200-m dash in 19.95 s. Calculate the runner's average speed. (Round your answer to one decimal place.)

10.0 m/s

If a car is moving at 30 km/h for 6 mins, what is the distance that the car has traveled. (Give your answer in terms of METERS)

3,000 m

A bicycle moves from rest to 17 m/s in 4 sec. What is the acceleration of the bicycle? (Use m/s^2 for the units and round to one decimal place.)

4.3 m/s^2

A car moves from rest to 24 m/s in 4 sec. What is acceleration of the car? (Use m/s^2) for the units.)

6 m/s^2

At the olympics, a female runner runs the 400-m dash in 49.41 s. Calculate the runner's average speed. (Round your answer to one decimal place).

8.1 m/s

A ball that is dropped from the roof of a building hits the ground in 9s. If there were no air resistance, what would be the ball's final speed?

88.2 m/s

If the speed of an object in uniform circular motion is tripled and the radial distance remains constant, then the magnitude of the centripetal acceleration increases by what factor?

9

An object in free fall has

A velocity that changes 9.8 m/s each second

Centripetal means

Center seeking

If one ball is thrown horizontally and another ball is dropped simultaneously from the same height, the thrown ball will hit the ground first.

False

Because air resistance reduces the velocity of a projectile, the maximum range occurs at an angle less than 45 degrees.

True

Motion necessarily involves

a change in position

A rate at which an object's velocity changes with time is called its

acceleration

The rate at which an object's velocity changes with time is called its

acceleration

An object that is moving with an acceleration different from zero will always have a(an)_____________ velocity.

changing