Dynamics

A 'newton' is a unit of

• force

• acceleration

• distance

• speed

• energy

1 newton is equivalent to the force required to

• accelerate a 1 kg mass by 1 m/s/s

• move a 1 kg mass 1 metre

• accelerate a 1 kg mass to a speed of 1 m/s

A 1 kg rock is travelling through space at 1 m/s. A force of 1 newton in the OPPOSITE direction is applied to it for 1 second. It's speed is now _ metres per second.

You are standing in a staionary elevator. The elevator begins moving upward. The normal force on your body has:

• increased

• decreased

• stayed the same

Two objects with unequal mass. The object with more mass has

• more inertia

• less inertia

A 100 kg object which has a 100 newton force applied to it for 1 second. 10 seconds later, it will be moving at a speed of . . .

• 1 m/s

• 10 m/s

• 0 m/s

• 30 m/s

Gravity is

• an acceleration

• a force

In physics, weight is a

• force

• mass

If the acceleration due to earth's gravity is 9.8 m/s/s, then the force due to gravity on a 10 kg mass is

• -98 newtons

• -9.8 newtons

• -.98 newtons

• -19.8 newtons

If it was floating in space, moving this car by pushing it would be

• nearly as hard as getting it moving on earth

• very easy, because it would have no weight